Gangwar, Tripti, Dipti Menral (Nee Bora), and Madhup Chandra. 2010. “Dibutyl and Diphenyl Substituted Tin Derivatives of N-(o-Hydroxy Substituted Benzyl) Alanines”. Asian Journal of Chemistry 6 (4):968-76. https://asianpubs.org/index.php/ajchem/article/view/32077.