Reference intervals of serum copper, selenium, rubidium, zinc, and magnesium with evaluation of the influence of age, sex, and physical activity. Bulgarian Medical Journal, Sofia, BG, v. 20, n. 2, p. 67–72, 2026. Disponível em: https://journals.mu-sofia.bg/index.php/bmj/article/view/1112.. Acesso em: 24 aug. 2026.