@article{JETPL.109.63, title = {}, author = {Dickmann, S.}, journal = {JETP Lett.}, volume = {109}, issue = {1}, pages = {63}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19010120}, note = {[Pisma v ZhETF 109, 63 (2019)]} }