@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/}
}