Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1995_25_1a_14, author = {Bodro\v{z}a Olga}, title = {Enumeration of oriented walks in digraphs using system of recurrence relations}, journal = {Novi Sad Journal of Mathematics}, pages = {129-140}, publisher = {mathdoc}, volume = {25}, number = {1}, year = {1995}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1995_25_1a_14/} }
Bodroža Olga. Enumeration of oriented walks in digraphs using system of recurrence relations. Novi Sad Journal of Mathematics, Tome 25 (1995) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1995_25_1a_14/