@article{02248136, title = {Even bonds of prescribed directed parity.}, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {12}, year = {2005}, zbl = {1079.05084}, language = {en}, url = {http://dml.mathdoc.fr/item/02248136} }
Hartmann, Sven; Little, C.H.C. Even bonds of prescribed directed parity.. The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02248136/