Kumar Upadhyay, Raj, Seema Attri, Sanidhya Upadhyay, and Hemandra Kumar Tiwari. 2011. “Synthesis and Dyeing Action of Novel Thioindigoid Reactive Dyes”. Asian Journal of Chemistry 23 (7):3127-29. https://asianpubs.org/index.php/ajchem/article/view/10555.