Mali, S.L., B.V. Kabra, R.L. Pitliya, V.K. Vaidya, and Sursesh C. Ameta. 2010. “Photochemical Oxidation of Phenyl-3-(2-Pyridyl) Thiourea by Singlet Oxygen ”. Asian Journal of Chemistry 5 (4):808-12. https://asianpubs.org/index.php/ajchem/article/view/24934.