Nejjar, K., A. Zeriouh, E.M. Zakarya, L. Belkbir, and M. Hamad. 2011. “Thermal Decomposition of Lubricating Oil Under an Inert Atmosphere”. Asian Journal of Chemistry 23 (6):2478-82. https://asianpubs.org/index.php/ajchem/article/view/10447.