Chabasińska M, Przysławski J, Lisowska A, Schlegel-Zawadzka M, Grzymisławski M, Walkowiak J. Serum vitamin B12 and folic acid concentrations in vegetarians. Eur J Clin Exp Med [Internet]. 2007 Dec. 30 [cited 2026 Jul. 16];5(4):360–364. Available from: https://journals.ur.edu.pl/ejcem/article/view/13312