@article{JETPL.103.851, title = {}, author = {Makarov, D. N. and Matveev, V. I.}, journal = {JETP Lett.}, volume = {103}, issue = {12}, pages = {756}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16120043}, note = {[Pisma v ZhETF 103, 851 (2016)]} }