@article{JETPL.103.578, title = {}, author = {Dorozhkin, S. I.}, journal = {JETP Lett.}, volume = {103}, issue = {8}, pages = {513}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1608004X}, note = {[Pisma v ZhETF 103, 578 (2016)]} }