Seiji Kumagai works on the presence of the Sakya sect in Bhutan, cf. A study on a religious minority in Bhutan: actual condition of Sa skya pa school (presented by at the third ISYT, 2012), "ISYT 2012 Abstract Book":http://www.isyt.org/ISYT_abstract.pdf (accessed: 2013-03-12)
genealogies mentioned in TPS [1999] (vol. 1, pp. 154ff.)
h2. Political Agents
short summary on the relations between Sakya and the Mongol empire Bretfeld 2007 (pp. 372f.)
Preceptor-Patron Relationship between Genghis Khan and Sakya Maher 2009 (ch. 4, pp. 199-242)
deb ther kun gsal me long [1987] (ch. 4, pp. 150-195), ལེའུ་བཞི་པ། ས་སྐྱ་པའི་དུས་སྐབས་དང་། བོད་མེས་རྒྱལ་གྱི་མངའ་ཁོངས་སུ་བསྒྱུར་པ།