Mohd Zain, Sharifuddin. 1996. “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 17 (2):101-7. https://samudera.um.edu.my/index.php/MJS/article/view/9420.