Givianrad, M.H., and A. Bahrami. “Microwave Assisted Synthesis of Meso-Tetraphenylporphyrin and Its Application for Trace Metal Spectrophotometric Determination”. Asian Journal of Chemistry, vol. 25, no. 11, June 2013, pp. 6102-4, doi:10.14233/ajchem.2013.14273.