@article{JETPL.98.38, title = {}, author = {Dyugaev, A. M. and Grigoriev, P. D. and , }, journal = {JETP Lett.}, volume = {98}, issue = {1}, pages = {33}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13130080}, note = {[Pisma v ZhETF 98, 38 (2013)]} }