@article{10_4153_CMB_1973_077_3,
     author = {Mordell, L. J.},
     title = {Systems of {Congruences}},
     journal = {Canadian mathematical bulletin},
     pages = {457--462},
     year = {1973},
     volume = {16},
     number = {3},
     doi = {10.4153/CMB-1973-077-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-077-3/}
}