@article{1183505307,
author = {MacLane, Saunders},
title = {A conjecture of Ore on chains in partially ordered sets},
journal = {Bull. Amer. Math. Soc.},
volume = {49},
number = {12},
year = {1943},
pages = { 567-568},
language = {en},
url = {http://dml.mathdoc.fr/item/1183505307}
}
MacLane, Saunders. A conjecture of Ore on chains in partially ordered sets. Bull. Amer. Math. Soc., Tome 49 (1943) no. 12, pp. 567-568. http://gdmltest.u-ga.fr/item/1183505307/