@article{bwmeta1.element.bwnjournal-article-aav59i1p59bwm,
author = {Simpson, R. and Zeilberger, Doron},
title = {Necessary conditions for distinct covering systems with square-free moduli},
journal = {Acta Arithmetica},
volume = {58},
year = {1991},
pages = {59-70},
zbl = {0697.10004},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav59i1p59bwm}
}
Simpson, R.; Zeilberger, Doron. Necessary conditions for distinct covering systems with square-free moduli. Acta Arithmetica, Tome 58 (1991) pp. 59-70. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav59i1p59bwm/