@article{DA_1976_15_a6,
     author = {A. I. Serdyukov},
     title = {Reciprocal reducibility of some extremal problems in graph theory},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {68--73},
     publisher = {mathdoc},
     number = {15},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_1976_15_a6/}
}