@article{JETPL.98.121, title = {}, author = {Alisultanov, Z. Z.}, journal = {JETP Lett.}, volume = {98}, issue = {2}, pages = {111}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13140129}, note = {[Pisma v ZhETF 98, 121 (2013)]} }