@article{JETPL.103.668, title = {}, author = {Kolesnikov, S. V.}, journal = {JETP Lett.}, volume = {103}, issue = {9}, pages = {588}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16090071}, note = {[Pisma v ZhETF 103, 668 (2016)]} }