R. H. Najem, H. I. Khaleel, and F. A. Mohammed, “Review: Comparative Analysis of Structures, Functions, Coordination and Applications of N-Fused and N-Confused Porphyrins”, Stallion J. Multidiscip. Assoc. Res. Stud., vol. 5, no. 4, pp. 39–49, Aug. 2026.