Gurumeet C. Wadhawa, Dinanath D. Patil. “GREEN SYNTHESIS OF 3, 4-DIHYDROPYRIMIDINONE USING FERROUS SULPHATE AS RECYCLABLE CATALYST”. Journal of Pharmaceutical Research and Opinion 1, no. 6 (February 23, 2014). Accessed September 21, 2024. http://medicaleditor.uk/index.php/jpro/article/view/679.