@article{JETPL.109.621, title = {}, author = {Rusina, G. G. and Borisova, S. D. and Chulkov, E. V.}, journal = {JETP Lett.}, volume = {109}, issue = {9}, pages = {600}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19090108}, note = {[Pisma v ZhETF 109, 621 (2019)]} }