00622naa#a2200169#i#450# EN\\bibl\7517 20240520162943.1 20220516b2022####ek#y0engy0150####ca RU Preparation of magnetite nanoparticles doped with molybdenum, tantalum, vanadium, and niobium and their catalytic properties by the example of the Michael reaction Conference article/thesis Kemerovo Kemerovo State University 2022 0 с. Conference article/thesis local Larina V V Deryabina E A Chupakhin Evgeny G. vestnik-hss.kemsu.ru