A combinatorial problem.
Thrall, R. M.
Michigan Math. J., Tome 1 (1952) no. 2, p. 81-88 / Harvested from Project Euclid
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Publié le : 1952-01-14
Classification:  09.0X 
@article{1028989731,
     author = {Thrall, R. M.},
     title = {A combinatorial problem.},
     journal = {Michigan Math. J.},
     volume = {1},
     number = {2},
     year = {1952},
     pages = { 81-88},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1028989731}
}

Thrall, R. M. A combinatorial problem.. Michigan Math. J., Tome 1 (1952) no. 2, pp.  81-88. http://gdmltest.u-ga.fr/item/1028989731/