@article{1093893711,
author = {Schumm, G. F.},
title = {On some open questions of B. Soboci\'nski.},
journal = {Notre Dame J. Formal Logic},
volume = {10},
number = {1},
year = {1969},
pages = { 261-262},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893711}
}
Schumm, G. F. On some open questions of B. Sobociński.. Notre Dame J. Formal Logic, Tome 10 (1969) no. 1, pp. 261-262. http://gdmltest.u-ga.fr/item/1093893711/