@article{JETPL.105.759, title = {}, author = {Khrapak, A. G. and Bronin, S. Ya.}, journal = {JETP Lett.}, volume = {105}, issue = {12}, pages = {797}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17120104}, note = {[Pisma v ZhETF 105, 759 (2017)]} }