@article{DAN_1991_321_3_a16,
     author = {N. N. Sirota and Zh. K. Zhalgasbekova},
     title = {X-ray determination of elastic constants of chalcopyrite},
     journal = {Doklady Akademii Nauk},
     pages = {513--517},
     publisher = {mathdoc},
     volume = {321},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_3_a16/}
}