@article{JETPL.109.579, title = {}, author = {Glushkov, A. V. and Saburov, A. V.}, journal = {JETP Lett.}, volume = {109}, issue = {9}, pages = {559}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19090017}, note = {[Pisma v ZhETF 109, 579 (2019)]} }