@article{JETPL.107.276, title = {}, author = {, and Kanevsky, V. M. and , }, journal = {JETP Lett.}, volume = {107}, issue = {4}, pages = {269}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18040124}, note = {[Pisma v ZhETF 107, 276 (2018)]} }