Andruski, J.E. & M. Ratliff. (2000). Phonation types in production of phonological tone: the case of Green Mong. Journal of the International Phonetic Association, 30, 63-82.

Archangeli, D. & D. Pulleyblank. (1994). Grounded phonology. Cambridge (MA): MIT Press.

Bailly, G., Laboissière, R., & A. Galván. (1997). Learning to speak: speech production and sensori-motor representations. In P. Morasso & V. Sanguineti (eds.), Self-organization, computational maps, and motor control (pp. 593-615). Amsterdam: Elsevier Science.

Bamgbose, A. (1967). A short Yoruba grammar. Lagos: Heinemann Educational Books.

Brown, J.C. & C. Golston. (2002). Generalized x-bar theory and the evolution of grammar. Paper presented at the Fourth International Evolution of Language Conference, Harvard University.

Carstairs-McCarthy, A. (1999). The origins of complex language: an inquiry into the evolutionary beginnings of sentences, syllables, and truth. New York: Oxford.

Catford, J.C. (1964). Phonation types: the classification of some laryngeal components of speech production. In D. Abercrombie, D.B. Fry, P.A.D. MacCarthy, N.C. Scott & J.L.M. Trim (eds.), In honor of Daniel Jones (pp. 26-37). London: Longmans.

Catford, J.C. (1977). Fundamental problems in phonetics. Edinburgh: Edinburgh University Press.

Chomsky, N. (1959). Review of B.F. Skinner: Verbal Behavior. Language, 35, 26-58.

Cruse, H. (2003). The evolution of cognition: a hypothesis. Cognitive Science, 27, 135-155.

Darwin, C. R. (1859). The origin of species. London: John Murray.

Esling, J.H. (2002). The laryngeal sphincter as an articulator: how register and phonation interact with vowel quality and tone. Paper presented at the Western Conference on Linguistics, University of British Columbia.

Fisher-Jørgensen, E. (1985). Some basic vowel features, their articulatory correlates, and their explanatory power in phonology. In V.A. Fromkin (Ed.), Essays in honor of Peter Ladefoged, (pp. 79-100) Orlando, Florida: Academic Press.

Fant, G. (1960). Acoustic theory of speech production. The Hague: Mouton.

Gallese, V., Fadiga, L., Fogassi, L., & Rizzolatti, G. (1996). 1996. Action recognition in the premotor cortex. Brain, 199, 593-609.

Gildersleeve-Neumann, C.E., Davis, B.L. & P.F. MacNeilage. (2000). Contingencies governing the production of fricatives, affricates, and liquids in babbling. Applied Psycholinguistics, 21, 341-363.

Hauser, M. (1997). The evolution of communication. Cambridge: MIT Press.

Herbert, R.K. (1990). The relative markedness of click sounds: Evidence from language change, acquisition, and avoidance. Anthropological Linguistics, 32, 120-138.

Iverson, G.K. & J.C. Salmons. (1995). Aspiration and laryngeal representation in Germanic. Phonology, 12, 369-96.

Jakobson, R. (1962). Selected writings. The Hague: Mouton.

Kehrein, W. (2002). Phonological representation and phonetic phasing: affricates and laryngeals. Max Niemeyer Verlag.

Kirk, P., Ladefoged, J. & P. Ladefoged. (1993). Quantifying acoustic properties of modal, breathy and creaky vowels in Jalapa Mazatec. In A. Mattina & T. Montler (Eds.), American Indian linguistics and ethnography in honor of Laurence C. Thompson, (pp. 435-450). Missoula: University of Montana.

Ladefoged, P. (1971). Preliminaries to linguistic phonetics. Chicago: University of Chicago Press.

Ladefoged, P. & I. Maddieson. (1996). Sounds of the world's languages. Oxford: Blackwell.

Ladefoged, P. & A. Trail. (1984). Linguistic phonetic description of clicks. Language, 60, 1-20.

Laver, J. (1980). The phonetic description of voice quality. Cambridge: Cambridge University Press.

Laver, J. (1994). Principles of phonetics. Cambridge: Cambridge University Press.

Lieberman, P. (1984). The biology and evolution of language. Cambridge (MA): Harvard University Press.

Lindblom, B. (1986). Phonetic universals in vowel systems. In J.J. Ohala & J.J. Jaeger (eds.), Experimental phonology (pp. 13-44). Orlando: Academic Press.

Locke, J.L. (1983). Phonological acquisition and change. New York: Academic Press.

Lombardi, L. (1995). Laryngeal neutralization and syllable wellformedness. Natural Language and Linguistic Theory, 13, 39-74.

MaKay, I.R.A. (1977). Tenseness in vowels: an ultrasonic study. Phonetica, 34, 325-315.

MacNeilage, P.F. (1998). The frame/content theory of evolution of speech production. Behavioral and Brain Sciences, 21, 499-511.

MacNeilage, P.F. & B.L. Davis. (1990). Acquisition of speech production: frames, then content. In M. Jeannerod (Ed.), Attention and performance XIII (pp. 453-475). Hillside, NJ: Lawrence Erlbaum Associates.

MacNeilage, P.F. & B.L. Davis. (1993). Motor explanations of babbling and early speech patterns. In B. De Boysson-Bardies,S. De Schonen, P. Jusczyk, P. MacNeilage & J. Morton (Eds.), Developmental neurocognition: speech and face processing in the first year of life (pp. 341-352). Dordrecht: Kluwer.

MacNeilage, P.F. & B.L. Davis. (1999). Evolution of the form of spoken words. Evolution of Communication, 3, 3- 20.

MacNeilage P.F. & B.L. Davis. (2000). Evolution of speech: The relation between ontogeny and phylogeny. In C. Knight, M. Studdert-Kennedy, & J.R. Hurford, (Eds.), The evolutionary emergence of language: social function and the origins of linguistic form, (pp. 146-160). Cambridge: Cambridge University Press.

Maddieson, I. (1984). Patterns of sounds. Cambridge: Cambridge University Press.

Maddieson, I. (1987a). Revision of the IPA: lingua-labials as a test case. Journal of the International Phonetic Association, 17, 26-30.

Maddieson, I. (1987b). Lingua-labials. Paper presented the 113th Meeting of the Acoustical Society of America. Indianpolis, May 1987. Abstract in Journal of the Acoustical Society of America 81/S1, S65.

Merrifield, W.R. (1963). Palantla Chinantec syllable types. Anthropological Linguistics, 5, 1-16.

Nowicki, S., Westneat, M. & W. Hoese. (1992). Birdsong: motor function and the evolution of communication. Seminars in Neuroscience, 4, 385-390.

Rand, A.S. (1988). An overview of anuran acoustic communication. In B. Fritzsch, M.J. Ryan, W. Wilczynski, T.E. Hetherington, & W. Walkowiak (Eds.), The evolution of the amphibian auditory system (pp. 415-432). New York: John Wiley & Sons.

Rizzolatti, G. & M.A. Arbib. (1998). Language within our grasp. Trends in Neurosciences, 21, 188-194.

Rizzolatti, G., Craighero, G., & L. Fadiga. (2002). The mirror system in humans. In Stamenov & Gallese (2002), (pp. 37-59).

Rizzolatti, G., Fadiga, L., Fogassi, L., & Gallese, V. (1996). Premotor cortex and the recognition of motor actions. Cognitive Brain Research, 3, 131-141.

Saussure, F. de. (1916/1960). Cours de linguistique générale [Course in General Linguistics]. Ed. C. Bally, A. Sechehaye & A. Riedlinger, translated by W. Baskin. New York: McGraw-Hill.

Stamenov, M.I. & V. Gallese (eds.). (2002). Mirror neurons and the evolution of brain and language. Amsterdam: John Benjamins Publishing Company.

Steriade, D. (1994). Complex onsets as single segments: the Mazateco pattern. In J. Cole & C. Kisseberth (Eds.), Perspectives in phonology, (pp. 203-91). Stanford, CA: Center for the Study of Language and Information.

Stevens, K. N. (1972). The quantal nature of speech: Evidence from articulatory-acoustic data. I .B. Denes & E.E. David Jr. (Eds.), Human communication: A unified view, (pp. 51-66) New York: McGraw-Hill.

Suthers, R.A. & D.H. Hector. (1988). Individual variation in vocal tract resonance may assist oilbirds in recognizing echoes of their own sonar clicks. In P.E. Noichtigall & P.W.B. Moore (Eds.), Animal sonar: processes and performances (pp. 87-91). New York: Plenum Press.

Svantesson, J.-O. (1983). Kammu phonology and morphology. Lund, Sweden: Liber Forlug.

Westneat, M., Long, H., Hoese, W. & S. Nowicki. (1993). Kinematics of birdsong: functional correlation of cranial movements and acoustic features in sparrows. Journal of Experimental Biology, 182, 147-171.

Yang, P. (2000). A reanalysis of tones in White Hmong. Paper presented at the Western Conference on Linguistics, California State University, Fresno.