Oliveira, V. R. de and Nogueira, F. A. R. (2024) “Spectrophotometric investigation of natural dyes of Portulaca grandiflora and Catharanthus roseus flowers”, Seven Editora, pp. 345–359. Available at: https://sevenpublicacoes.com.br/editora/article/view/4932 (Accessed: 16 September 2024).