@article{1093956753, author = {SobociAski, BolesAaw}, title = {Three set-theoretical formulas.}, journal = {Notre Dame J. Formal Logic}, volume = {2}, number = {1}, year = {1961}, pages = { 58-64}, language = {en}, url = {http://dml.mathdoc.fr/item/1093956753} }
SobociÅski, BolesÅaw. Three set-theoretical formulas.. Notre Dame J. Formal Logic, Tome 2 (1961) no. 1, pp. 58-64. http://gdmltest.u-ga.fr/item/1093956753/