Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1982__32_3_a5, author = {Harminc, Mat\'u\v{s}}, title = {Solutions and kernels of a directed graph}, journal = {Mathematica slovaca}, pages = {263--267}, publisher = {mathdoc}, volume = {32}, number = {3}, year = {1982}, mrnumber = {670002}, zbl = {0491.05029}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1982__32_3_a5/} }
Harminc, Matúš. Solutions and kernels of a directed graph. Mathematica slovaca, Tome 32 (1982) no. 3, pp. 263-267. http://geodesic.mathdoc.fr/item/MASLO_1982__32_3_a5/