@article{JETPL.109.789, title = {}, author = {Putilov, A. V. and , and , and , }, journal = {JETP Lett.}, volume = {109}, issue = {11}, pages = {755}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19110122}, note = {[Pisma v ZhETF 109, 789 (2019)]} }