@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/