1. Abraham, M.R., Williamson, V.M. & Westbrook, S.L. (1994). A cross-age study of the understanding of five chemistry concepts. Journal of Research in Science Teaching, 31(2), 147–165.
2. Cachapuz, A.F.C. & Maskill, R. (1987). Detecting changes with learning in the organization of knowledge: use of word association tests to follow the learning of collision theory. International Journal of Science Education, 9(4), 491–504.
3. Cakmakci, G. (2003a). A cross-sectional study of the understanding of chemical kinetics among Turkish secondary and undergraduate students. Unpublished PhD proposal, The University of Leeds, Leeds, UK.
4. Cakmakci, G. (2003b). Upper secondary school and undergraduate students’ understandings of the concept of catalysis. Paper presented at the Variety in Chemistry Education, Dublin, Ireland, 31st August–2nd September 2003.
5. Cakmakci, G. (2004). Science Education In Turkey: A Bibliography on Teaching and Learning Science. Retrieved April 2004, from the World Wide Web: http://www.geocities.com/ScienceEducationinTurkey/