Mohd Zain, S. “Structure Determination of N-Phenylcarbazole from Semi-Empirical 88) Inorg, Quantum Chemical Calculations. Extent of Twisting Between the Carbazole Hn, 0. And and Phenyl Moieties”. Malaysian Journal of Science, vol. 17, no. 2, Apr. 1996, pp. 101-7, https://malindojournal.um.edu.my/index.php/MJS/article/view/9420.