OLIVEIRA, Vitória Rocha de; NOGUEIRA, Fred Augusto Ribeiro. Spectrophotometric investigation of natural dyes of Portulaca grandiflora and Catharanthus roseus flowers. Seven Editora, [S. l.], p. 345–359, 2024. Disponível em: https://sevenpubl.com.br/editora/article/view/4932. Acesso em: 21 aug. 2025.