Bouharis, Khadidja, Mohamed Lotfi Souici, and Djelloul Messadi. 2010. “Retention Indices for Programmed-Temperature Gas Chromatography of Polycyclic Aromatic Hydrocarbons: A QSRR Study”. Asian Journal of Chemistry 23 (3):1044-48. https://asianpubs.org/index.php/ajchem/article/view/16110.