Mochizuki, T., Oura, H., Sato, T., Nishimori, T., Tsubakimoto, M., Nakahara, J., Yamauchi, Y., & Miyatani, T.
InProceedings of the 9th international conference on Computer supported collaborative learning-Volume 2 (pp. 100-102). International Society of the Learning Sciences, 2009