@article{JETPL.107.237, title = {}, author = {, and , and Samokhvalov, P. S. and , and , and Nabiev, I. R.}, journal = {JETP Lett.}, volume = {107}, issue = {4}, pages = {233}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18040069}, note = {[Pisma v ZhETF 107, 237 (2018)]} }