“The Effect of Four Lateral Methyl Groups on The Thermotropic Behavior of Azo Liquid Crystal Homologous Series”. Ibn AL-Haitham Journal For Pure and Applied Sciences 23, no. 1 (May 28, 2017): 260–271. Accessed April 28, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1005.