@article{PFMT_2012_4_a2,
     author = {A. F. Konstantinova and T. G. Golovina and E. A. Evdischenko and B. V. Nabatov and K. K. Konstantinov},
     title = {Special cases of low symmetry absorbing crystals},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {15--20},
     publisher = {mathdoc},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2012_4_a2/}
}