Determination of Para-Phenylenediamine (PPD) in Henna Samples Collected from Libyan Local Markets Using Spectrophotometric Method. مجلة جامعة الزيتونة , [S. l.], n. 50, p. 527–538, 2024. Disponível em: https://www.azzujournal.com/index.php/azujournal/article/view/281. Acesso em: 25 2025.