@article{1093891706, author = {Chapin, E. William}, title = {Set-valued set theory. II.}, journal = {Notre Dame J. Formal Logic}, volume = {16}, number = {1}, year = {1975}, pages = { 255-267}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891706} }
Chapin, E. William. Set-valued set theory. II.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 255-267. http://gdmltest.u-ga.fr/item/1093891706/