PATEL, ROHIT, NAITIK PATEL, and K.C. PATEL. 2010. “Synthesis and Properties of Acid Dyes Derived from 4,4’-Methylene bis(2,5-Dichloro Aniline)”. Asian Journal of Chemistry 19 (1):149-54. https://asianpubs.org/index.php/ajchem/article/view/20385.