@article{1093890903,
author = {Welsh, Paul J.},
title = {On the number of overlapping subsets of a set.},
journal = {Notre Dame J. Formal Logic},
volume = {14},
number = {1},
year = {1973},
pages = { 269-272},
language = {en},
url = {http://dml.mathdoc.fr/item/1093890903}
}
Welsh, Paul J. On the number of overlapping subsets of a set.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp. 269-272. http://gdmltest.u-ga.fr/item/1093890903/