Usharani, V., A.K.S. Bhujanga Rao, M. Pulla Reddy, and P.K. Dubey. 2010. “Synthesis of Aryl Urea Derivatives from Aryl Amines and Aryl Isocyanates”. Asian Journal of Chemistry 23 (4):1802-6. https://asianpubs.org/index.php/ajchem/article/view/10212.