@article{DAN_1977_236_5_a22, author = {O. V. Yakubovich and M. A. Simonov and Yu. K. Egorov-Tismenko and N. V. Belov}, title = {Crystalline structure of}, journal = {Doklady Akademii Nauk}, pages = {1123--1126}, year = {1977}, volume = {236}, number = {5}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1977_236_5_a22/} }