Finikova, Olga S.; Cheprakov, Andrei V.; Beletskaya, Irina P.; Carroll, Patrick J.; Vinogradov, Sergei A. (January 2004). "Novel Versatile Synthesis of Substituted Tetrabenzoporphyrins". The Journal of Organic Chemistry69 (2): 522–535. doi:10.1021/jo0350054.
Ono, Noboru (2008). "Barton-Zard Pyrrole Synthesis and Its Application to Synthesis of Porphyrins, Polypyrroles, and Dipyrromethene Dyes". HETEROCYCLES75 (2): 243. doi:10.3987/REV-07-622.