@article{GDZPPN002410079,
title = {Choice Mappings of Certain Classes of Finite Sets.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {23-36},
zbl = {0221.05006},
url = {http://dml.mathdoc.fr/item/GDZPPN002410079}
}
Lewin, Mordechai. Choice Mappings of Certain Classes of Finite Sets.. Mathematische Zeitschrift, Tome 129 (1972) pp. 23-36. http://gdmltest.u-ga.fr/item/GDZPPN002410079/