@article{10_4064_aa_48_1_73_79,
     author = {Marc Berger and Alexander Felzenbaum and Aviezri Fraenkel},
     title = {Necessary condition for the existence of an incongruent covering system with odd moduli {II}},
     journal = {Acta Arithmetica},
     pages = {73--79},
     year = {1987},
     volume = {48},
     number = {1},
     doi = {10.4064/aa-48-1-73-79},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-48-1-73-79/}
}