@article{DA_2011_18_1_a6,
     author = {D. S. Malyshev},
     title = {Minimal hard classes of graphs for the edge list-ranking problem},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {70--76},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2011_18_1_a6/}
}