2Noam Chomsky and Morris Halle, The Sound of Pattern in English, New York: Harper & Row,1968.
3Nikolai Trubetzkoy Letters and Notes, Roman Jakobson 主编, 19740
4Joseph Greenberg, "Some universals of grammar with particular reference to the order of meaningful dements," in Universals of Language, Cambridge: MIT Press, pp. 73-113,p. 22.
5Rod Ellis, The Study of Second Language Acquisition. Oxford:Oxford University Press, 1994.
6Talmy Givon, “Isomorphism and Grammatical Code: Cognitive and Biological Considerations”, in R Simone ed. Iconicity in Language, Amsterdam: Benjamin.s, 1995, pp. 47 - 76.
7George Kingsley Zipf, Selected Studies of the Principle of Relative Frequency in Language, Harvard University Press, 1932.
