CHARACTERISTIC FEATURES OF TOXIC METAL CONTENT IN HAIR SAMPLES OF FOREIGN STUDENTS AT RUDN UNIVERSITY FROM DIFFERENT GEOGRAPHIC REGIONS Статья Kirichuk A.A., Skalny A.V., Chizhov A.Y., Tskhovrebov A.G., Schaumlöffel Dirk, Kritchenkov A.S. Журнал микроэлементы в медицине и биологии. Elsevier GmbH. Том 80. 2023. 127303 с.