//-->
Group utility in the micro motivation of collective action : the case of membership in the AARP
Gupta, Dipak K., (1997)
Malapportionment and roll-call voting in Indiana, 1923-1963 : a computer simulation
Hofstetter, C. Richard, (1971)
Path to collective madness : a study in social order and political pathology
Gupta, Dipak K., (2001)