CSONGRÁDI, Gyöngyi. Percentage philanthropy - an experimental research. Periodica Polytechnica Social and Management Sciences, [S. l.], v. 16, n. 1, p. 33–43, 2008. 10.3311/pp.so.2008-1.04. Disponível em: https://pp.bme.hu/so/article/view/1612. Acesso em: 3 may. 2024.