Ji, Hai-Feng. “Clarifying Aromaticity and Delocalization With the Principle of π-Electron Pair Interaction (PEPI)”. Chemical Reports 6, no. 1 (November 12, 2025): 325-330. Accessed November 14, 2025. https://www.syncsci.com/journal/CR/article/view/CR.2025.01.003.