@article{CMJ_2010__60_1_a4,
     author = {Volkmann, Lutz},
     title = {A bound on the $k$-domination number of a graph},
     journal = {Czechoslovak Mathematical Journal},
     pages = {77--83},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {2010},
     mrnumber = {2595071},
     zbl = {1224.05385},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2010__60_1_a4/}
}