Gao, Wei, and MOHAMMAD REZA FARAHANI. “The Theta Polynomial Θ(G,x) and the Theta Index Θ(G) of Molecular Graph Polycyclic Aromatic Hydrocarbons PAHk”. JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 1 (November 11, 2015): 3934–3939. Accessed November 23, 2024. https://rajpub.com/index.php/jac/article/view/847.