@article{Pauwels, author = {Pauwels, W. M. A.}, title = {A Mathematical Note}, series = {Phelps, E. S. (Ed.): Altruism, morality and economic theory, New York (Russell Sage Foundation) 1975, pp. 107-114.}, journal = {Phelps, E. S. (Ed.): Altruism, morality and economic theory, New York (Russell Sage Foundation) 1975, pp. 107-114.}, language = {en} }