@article{1183741197, author = {Maddy, Penelope}, title = {Proper Classes}, journal = {J. Symbolic Logic}, volume = {48}, number = {1}, year = {1983}, pages = { 113-139}, language = {en}, url = {http://dml.mathdoc.fr/item/1183741197} }
Maddy, Penelope. Proper Classes. J. Symbolic Logic, Tome 48 (1983) no. 1, pp. 113-139. http://gdmltest.u-ga.fr/item/1183741197/