Ion-pair HPLC applied to the assay of the vitamin B group mixture: theorical bases and method validation. Revista Brasileira de Ciências Farmacêuticas, [S. l.], v. 40, n. 3, p. 363–371, 2004. DOI: 10.1590/S1516-93322004000300012. Disponível em: https://revistas.usp.br/rbcf/article/view/43987.. Acesso em: 19 may. 2024.