@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/}
}