[文献書誌] Toshio Yamagishi, Toko Kiyonari: "Ingroup Cooperation and the Social Exchange Heuristic"Suleiman, R., Budescu, D. V., Fischer, I., & Messick, D. (Eds.), Contemporary Psychological Research on Social Dilemmas. Cambridge, UK: Cambridge University Press. (印刷中). (2002)