@article{DAN_1978_239_1_a1,
     author = {B. N. Apanasov and A. V. Tetenov},
     title = {On the existence of non-trivial quasiconformal deformations of {Kleinean} space groups},
     journal = {Doklady Akademii Nauk},
     pages = {14--17},
     publisher = {mathdoc},
     volume = {239},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_1_a1/}
}