Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1981_11_Nonea_28, author = {Marcu D\u{a}nut}, title = {Note on the spanning trees of a connected digraph}, journal = {Novi Sad Journal of Mathematics}, pages = {297-303}, publisher = {mathdoc}, volume = {11}, year = {1981}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1981_11_Nonea_28/} }
Marcu Dănut. Note on the spanning trees of a connected digraph. Novi Sad Journal of Mathematics, Tome 11 (1981). http://geodesic.mathdoc.fr/item/NSJOM_1981_11_Nonea_28/