共 25 条
[2]
BAYLEY DH, 1976, PUBLIC INTEREST, V44, P55
[5]
Bolnick B, 1975, ALTRUISM MORALITY EC, P197
[6]
BOLNICK BR, UNPUBLISHED
[9]
COOK PJ, 1976, CITIZEN COOPERATION
[10]
DOUTY CM, 1972, AM ECON REV, V62, P580