@article{MASLO_1980__30_4_a8,
     author = {Harminc, Mat\'u\v{s}},
     title = {On the $(m,n)$-basis of a digraph},
     journal = {Mathematica slovaca},
     pages = {401--404},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {1980},
     mrnumber = {595301},
     zbl = {0452.05028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1980__30_4_a8/}
}