@article{10_4064_aa_45_4_375_379,
     author = {Marc Berger and Alexander Felzenbaum and Aviezri Fraenkel},
     title = {Necessary condition for the existence of an incongruent covering system with odd moduli},
     journal = {Acta Arithmetica},
     pages = {375--379},
     publisher = {mathdoc},
     volume = {45},
     number = {4},
     year = {1985},
     doi = {10.4064/aa-45-4-375-379},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-45-4-375-379/}
}