1. See, for example, and Eds., Iron Porphyrins (Addison-Wesley, London 1983), Vol. 1;
2. Ed., The Porphyrins (Academic Press, New York, 1978), Vol. 1;
3. or Ed., Porphyrins and Metalloporphyrins (Elsevier, Amsterdam 1975).
4. See, for example, Ed., The Phthalocyanines (CRC Press Inc., 1983), Vol. 1.
5. Ab initiocalculations on porphin