Hussain, Ghulam, Nasir Abass, Ghulam Shabir, Makshoof Athar, Aamer Saeed, Rashid Saleem, Farman Ali, and Misbahul Ain Khan. “New Acid Dyes and Their Metal Complexes Based on Substituted Phenols for Leather: Synthesis, Characterization and Optical Studies”. Journal of Applied Research and Technology 15, no. 4 (June 11, 2019). Accessed May 6, 2024. https://jart.icat.unam.mx/index.php/jart/article/view/675.