1. The problem in support for elderly in change of family formation—Further discussion on change of family formation in China;Fei;J. Peking Univ. (Philos. Soc. Sci.),1983
2. Industrial Society and Social Welfare;Wilensky,1965
3. Social Insurance and Allied Services;Beveridge,1958
4. Foundation of Social Administration;Heisler,1977