Influence of sodium metabisulfite and glutathione on the stability of vitamin C in O/W emulsion and extemporaneous aqueous gel - Maia, Adriana Moura; Baby, André Rolim; Pinto, Claudinéia Aparecida Sales de Oliveira; Yasaka, Wilson Junitiro; Suenaga, Eunice Mayumi; Kaneko, Telma Mary; Velasco, Maria Valéria Robles (International Journal of Pharmaceutics, 2006)