“VIBRATIONAL FREQUENCY AND THERMODYNAMIC PROPERTIES OF NEUTRAL AND IONIC PYRENE AND ITS DERIVATIVES” (2023) FUDMA JOURNAL OF SCIENCES, 3(2), pp. 268–275. Available at: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1516 (Accessed: 8 September 2025).