Kumar, J.K.P. (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), pp. 503–508. Available at: https://periodicos.ufms.br/index.php/orbital/article/view/16023 (Accessed: 29 January 2026).