Michelle Janet Sorensen. ‘Making the Old New Again and Again: Legitimation and Innovation in the Tibetan Buddhist Chöd Tradition’. PhD diss., Columbia Univ., 2013. [URL / PDF]
(Texts translated: Shes rab kyi pha rol tu phyin pa zab mo gcod kyi man ngag gi gzhung bka’ tshoms chen mo; Shes rab khyi pha rol tu phyin pa’i man ngag yang tshoms zhus lan ma bzhugs pa; Shes rab kyi pha rol tu phyin pa’i man ngag nying tshoms chos kyi rtsa ba.)