Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1994__44_5_a6, author = {Porubsk\'y, \v{S}tefan}, title = {Identities involving covering systems. {II.}}, journal = {Mathematica slovaca}, pages = {555--568}, publisher = {mathdoc}, volume = {44}, number = {5}, year = {1994}, mrnumber = {1338428}, zbl = {0821.11008}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1994__44_5_a6/} }
Porubský, Štefan. Identities involving covering systems. II.. Mathematica slovaca, Tome 44 (1994) no. 5, pp. 555-568. http://geodesic.mathdoc.fr/item/MASLO_1994__44_5_a6/