@article{SM_1975_27_2_a6,
     author = {B. T. Rumov},
     title = {A~recursive construction of difference families in noncyclic groups},
     journal = {Sbornik. Mathematics},
     pages = {251--261},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_27_2_a6/}
}