@article{1093894369,
author = {Frascella, William J.},
title = {Certain counterexamples to the construction of combinatorial designs on infinite sets.},
journal = {Notre Dame J. Formal Logic},
volume = {12},
number = {1},
year = {1971},
pages = { 461-466},
language = {en},
url = {http://dml.mathdoc.fr/item/1093894369}
}
Frascella, William J. Certain counterexamples to the construction of combinatorial designs on infinite sets.. Notre Dame J. Formal Logic, Tome 12 (1971) no. 1, pp. 461-466. http://gdmltest.u-ga.fr/item/1093894369/