“Synthesis and Study the Mesomorphic Behaviour of New N- Acetyl and Their Diazetine: Mono and Twin”. Ibn AL-Haitham Journal For Pure and Applied Sciences 31, no. 1 (May 16, 2018): 88–98. Accessed April 27, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1856.