CHABASIŃSKA, M.; PRZYSŁAWSKI, J.; LISOWSKA, A.; SCHLEGEL-ZAWADZKA, M.; GRZYMISŁAWSKI, M.; WALKOWIAK, J. Serum vitamin B12 and folic acid concentrations in vegetarians. European Journal of Clinical and Experimental Medicine, [S. l.], v. 5, n. 4, p. 360–364, 2007. Disponível em: https://journals.ur.edu.pl/ejcem/article/view/13312. Acesso em: 16 jul. 2026.