Kumar, J. K. Prashanth, Boningari Thirupathi, Damma Devaiah, Avvari N. Prasad, Panagiotis Smirniotis, and Benjaram M. Reddy. 2018. “Rapid and Efficient N-Tert-Butoxy Carbonylation of Amines Catalyzed by Sulfated Tin Oxide Under Solvent-Free Condition”. Orbital: The Electronic Journal of Chemistry 10 (7), 503-8. https://periodicos.ufms.br/index.php/orbital/article/view/16023.