00525naa#a2200181#i#450# EN\\bibl\92061 20250901135041.1 3034-4689 20250801b2025####ek#y0engy0150####ca RU MULTIFRACTAL ANALYSIS OF DISPERSED POLYMETALLIC SYSTEMS Journal article Kazan Kazan National Research Technological University 2025 5 с. Journal article local Dresvyannikov Aleksandr Fedorovich vestniktu.ru