1. (a) Sessler, J. L.; Weghorn S. J.Expanded, Contracted, and IsomericPorphyrins; Elsevier: Oxford, 1997.
2. (b)The Porphyrin Handbook; Kadish, K. M., Smith, K. M., Guilard, R., Eds; Academic Press: San Diego, 1999; Vol. 2.
3. "N-Confused Porphyrin": A New Isomer of Tetraphenylporphyrin