Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1969__24_140948, author = {Morton Abramson}, title = {An {Elementary} {Set} {Partition} {Problem.}}, journal = {Elemente der Mathematik}, pages = {128--130}, publisher = {mathdoc}, volume = {24}, year = {1969}, zbl = {0322.05009}, url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140948/} }
Morton Abramson. An Elementary Set Partition Problem.. Elemente der Mathematik, Tome 24 (1969), pp. 128-130. http://geodesic.mathdoc.fr/item/ELMA_1969__24_140948/