@article{1077468485,
author = {Elgot, Calvin C. and Wright, Jesse B.},
title = {Series-parallel graphs and lattices},
journal = {Duke Math. J.},
volume = {26},
number = {1},
year = {1959},
pages = { 325-338},
language = {en},
url = {http://dml.mathdoc.fr/item/1077468485}
}
Elgot, Calvin C.; Wright, Jesse B. Series-parallel graphs and lattices. Duke Math. J., Tome 26 (1959) no. 1, pp. 325-338. http://gdmltest.u-ga.fr/item/1077468485/