@article{JETPL.104.740, title = {}, author = {, and , and , and , and Aronin, A. S.}, journal = {JETP Lett.}, volume = {104}, issue = {10}, pages = {726}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16220136}, note = {[Pisma v ZhETF 104, 740 (2016)]} }