New zircon-manganites of lanthanum and alkali metals - Turdiyev, Myktybek; Kasenov, Bulat; Nukhuly, Altynbek; Stoev, Mitko; Sagintaeva, Zhenisgul; Kasenova, Shuga; Kuanyshbekov, Erbolat (Chemical Bulletin of Kazakh National University, 2024)