Vysotskaya, E., S. Khrebtova, and I. Rekhtman. “Linking Macro and Micro through Element Cycle: Desing Research Approach for Introdutory Chemistry Course for 6-7 Grades”. LUMAT: International Journal on Math, Science and Technology Education, vol. 3, no. 3, July 2015, pp. 409-28, doi:10.31129/lumat.v3i3.1038.