@article{TIMM_1996_4_a4,
     author = {I. T. Mukhamet'yanov},
     title = {Block designs associated with normal subsets of finite groups},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {71--82},
     year = {1996},
     volume = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1996_4_a4/}
}