Darabut, Alina Madalina, et al. “Synthesis of Bis-Azobenzene Derivatives With Reactive Bromohexyl Unit and Carboxylic Acid Group Based on Disperse Yellow 7”. European Journal of Chemistry, vol. 11, no. 4, Dec. 2020, pp. 298-03, doi:10.5155/eurjchem.11.4.298-303.2032.