@article{JETPL.106.267, title = {}, author = {Zakharov, B. G.}, journal = {JETP Lett.}, volume = {106}, issue = {5}, pages = {283}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17170015}, note = {[Pisma v ZhETF 106, 267 (2017)]} }