@article{JETPL.100.674, title = {}, author = {Molotkov, S. N. and , }, journal = {JETP Lett.}, volume = {100}, issue = {9}, pages = {596}, year = {2014}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14210127}, note = {[Pisma v ZhETF 100, 674 (2014)]} }