@article{JETPL.117.264, title = {Manifestation of Memory and Butterfly in the Photon Echo on Erbium Ions in LuLiF4 and YLiF4}, author = {Shegeda, A. M. and Korableva, S. L. and Morozov, O. A. and Lisin, V. N. and Solovarov, N. K. and Tarasov, V. F.}, journal = {JETP Lett.}, volume = {117}, issue = {4}, pages = {267}, year = {2023}, doi = {10.1134/S0021364022603347}, url = {http://jetpletters.ru/ps/dx/10.31857/S1234567823040043}, note = {[Pisma v ZhETF 117, 264 (2023)]} }