Prospective visible laser active media based on disordered fluorite-type structure crystalsOleg Morozov, Sergey Kuznetsov, Vasiliy Konyushkin, Andrey Nakladov, Alexey Nizamitdinov, Pavel Fedorov and Vadim SemashkoEPJ Web Conf., 220 (2019) 03024DOI: https://doi.org/10.1051/epjconf/201922003024