Steffe & Thompson, 2000

Steffe, L. P., & Thompson, P. W. (with von Glaserfeld, E.). (2000). Teaching experiment methodology: Underlying principles and essential elements. In A. E. Kelly & R. A. Lesh (Eds.), Handbook of research design in mathematics and science education (pp. 267-306). Mahwah, NJ: Lawrence Erlbaum Associates.