1. Approval voting;Brams;Amer. Polit. Sci. Rev.,1978
2. Models of social choice;Danilov;Izvestija AN SSSR, ser. Technicheskaja kibernetika,1983
3. Methods of analysis of complex systems;Emeljanov,1977
4. Utility Theory for Decision Making;Fishburn,1970
5. Symmetric and consistent aggregation with dichotomous voting;Fishburn,1979