Bibliography
For a brief discussion of several teachers named Sonam Pel, see Leonard W.J. Van der Kuijp, 1995, "Two Biographies of Sakyasribhadra, The Eulogy of Khro phu Lo-tsa-ba and its "Commentary" by bSod-nams-dpal-bzang-po: Texts and Variants from Two Rare Exemplars Preserved in the Bihar Research Society, Patna, a Review Article." Journal of the American Oriental Society.