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@article{ELMA_1963__18_140760, author = {Eckford Cohen}, title = {Arithmetical {Notes,} {XIII.} {A} {Sequal} to {Note} {IV.}}, journal = {Elemente der Mathematik}, pages = {8--11}, publisher = {mathdoc}, volume = {18}, year = {1963}, zbl = {0147.30001}, url = {http://geodesic.mathdoc.fr/item/ELMA_1963__18_140760/} }
Eckford Cohen. Arithmetical Notes, XIII. A Sequal to Note IV.. Elemente der Mathematik, Tome 18 (1963), pp. 8-11. http://geodesic.mathdoc.fr/item/ELMA_1963__18_140760/