9Koschmann, T. Paradigm shifts and instructional technology An instruction [A]. T. Koschmann. CSCL: Theory and practice of an emerging paradigm [C]. Mahwah, NJ: Lawrence Erlbaum Associates. 1996. 1-23.
10Glasher, B., & Strauss, A. The Discovery of Grounded Theory [M]. Chicago: Aldine-Atherton, 1967.