Petkova P, Vasilev P. Al3+ ACCEPTORS AND THE OPTICAL PROPERTIES OF Bi12SiO20:Cr+Al: Al3+ ACCEPTORS AND THE OPTICAL PROPERTIES OF Bi12SiO20:Cr+Al. JSAR [Internet]. 2023 Mar. 9 [cited 2024 Nov. 7];5(1):146-53. Available from: https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/123