@article{1102969777,
author = {Fishburn, Peter C. and Spencer, Joel H.},
title = {Directed graphs as unions of partial orders.},
journal = {Pacific J. Math.},
volume = {39},
number = {3},
year = {1971},
pages = { 149-161},
language = {en},
url = {http://dml.mathdoc.fr/item/1102969777}
}
Fishburn, Peter C.; Spencer, Joel H. Directed graphs as unions of partial orders.. Pacific J. Math., Tome 39 (1971) no. 3, pp. 149-161. http://gdmltest.u-ga.fr/item/1102969777/