Amidon A. & Carey P. (1972). Why five-year-olds cannot understand before and after. JVLVB 11. 417–23.
Beilin H. (1975). Studies in the cognitive basis of language development. New York: Academic Press.
Bever T. G. (1970). The comprehension and memory of sentences with temporal relations. In Flores d'Arcais G. B. & Levelt W. J. M. (eds), Advances in psycholinguistics. Amsterdam, New York: North-Holland–American Elsevier.
Clark E. V. (1970). How young children describe events in time. In Flores d'Arcais G. B. & Levelt W. J. M. (eds), Advances in psycholinguistics. Amsterdam, New York: North Holland–American Elsevier.
Clark E. V. (1971). On the acquisition of the meaning of before and after. JVLVB 10. 266–75.
Coker P. L. (1978). Syntactic and semantic factors in the acquisition of before and after. JChLang 5. 261–77.
Coker P. L. & Legum S. E. (1975). An empirical test of semantic hypotheses relevant to the language of young children. Working papers on the kindergarten program quality assurance. SWRL for educational research development (Los Alamitos, California).
Corrigan R. (1978). Language development as related to stage 6 object permanence development. JChLang 5. 173–91.
Ferreiro E. & Sinclair H. (1971). Temporal relationships in language. IntJPsych 6. 39–47.
French L. A. & Brown A. L. (1977). Comprehension of before and after in logical and arbitrary sequences. JChLang 4. 247–56.
Hatch E. (1971). The young child's comprehension of time connectives. ChDev 42. 2111–13.
Inhelder B. & Piaget J. (1964). The early growth of logic in the child. London: Routledge & Kegan Paul.
Johnson H. L. (1975). The meaning of before and after for preschool children. JExpChPsych 19. 88–99.
Katz J. J. (1972). Semantic theory. New York: Harper.
Kavanaugh R. D. (1979). Observations on the role of logically constrained sentences in the comprehension of before and after. JChLang 6, 353–9
Moore T. E. & Harris A. (1978). Language and thought in Piagetian theory. In Siegel L. S. & Brainerd C. J. (eds), Alternatives to Piaget. New York: Academic Press.
Piaget J. (1959). The language and thought of the child. London: Routledge & Kegan Paul.
Piaget J. (1969). The child's conception of time. London: Routledge & Kegan Paul.
Piaget J. & Inhelder B. (1969). The psychology of the child. New York: Basic Books.
Scholnick E. & Adams M. (1973). Relationship between language and cognitive skills: passive voice comprehension, backward repetition, and matrix permutation. ChDev. 44. 741–6.
Taylor C. (1971). What is involved in a genetic psychology? In Mischel T. (ed), Cognitive psychology and epistemology. New York: Academic Press.
Weil J. (1970). The relationship between time conceptualization and time language in young children. Unpublished doctoral dissertation, City University of New York.