“Density Functional Theory and Ab Initio Calculations of the Heats of Formation of Pyrrole and Furan Oligomers: Progress Report”. ASIA PACIFIC JOURNAL OF SOCIAL INNOVATION 15, no. 2 (April 26, 2024): 113–128. Accessed March 16, 2026. https://journals.msuiit.edu.ph/tmf/article/view/503.