@article{bwmeta1.element.bwnjournal-article-fmv27i1p8bwm, author = {Leo Zippin}, title = {On monotonic complete covering systems}, journal = {Fundamenta Mathematicae}, volume = {27}, year = {1936}, pages = {116-122}, zbl = {0015.08106}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv27i1p8bwm} }
Zippin, Leo. On monotonic complete covering systems. Fundamenta Mathematicae, Tome 27 (1936) pp. 116-122. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv27i1p8bwm/