@article{DMGT_2002_22_1_a6,
     author = {Fiala, Jir{\'\i} and Kratochv{\'\i}l, Jan},
     title = {Partial covers of graphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {89--99},
     year = {2002},
     volume = {22},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2002_22_1_a6/}
}