@article{JETPL.103.314, title = {}, author = {Matveev, V. I. and Makarov, D. N.}, journal = {JETP Lett.}, volume = {103}, issue = {4}, pages = {286}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16040147}, note = {[Pisma v ZhETF 103, 314 (2016)]} }