1. Brislin, R. W.: 1970, ?Back translation for cross-cultural research?, Journal of Cross-Cultural Psychology, 1(3), 185?216.
2. Clarkson, P. C.: 1983, ?Types of errors made by Papua New Guinean students?, Education Studies in Mathematics, 14, 355?367.
3. Clarkson, P. C.: 1987, ?Language and mathematics: A brief review of the literature from Papua New Guinea?, Papua New Guinea Journal of Education, 23, (2), 155?162.
4. Clarkson, P. C.: 1991a, ?Mathematics in a multilingual society?, in K. Durkin and B. Shire (eds.), Language and mathematics education, Open University Press, London, pp. 237?246.
5. Clarkson, P. C.: 1991b, Bilingualism and mathematics learning, Deakin University Press, Geelong, Vic.