@article{10_4064_fm_123_2_133_136,
     author = {M. Parmenter},
     title = {Exact covering systems for groups},
     journal = {Fundamenta Mathematicae},
     pages = {133--136},
     publisher = {mathdoc},
     volume = {123},
     number = {2},
     year = {1984},
     doi = {10.4064/fm-123-2-133-136},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-123-2-133-136/}
}