Saleh Mahmud, S. A. .; Ferdous, T. .; Alam, M. M. .; Hossain, M. S.; Shozib, H. B. .; Khalil, F. .; Akter, F.; Hossain, M. N. Para-Phenylenediamine (PPD) in Commercially Available Henna Preparations in Bangladesh. Bioresearch Communications 2021, 8, 1088-1092.