historical sketch on the rin spungs pa/ by Kurtis Schaeffer (b. 1966), cf. "The Rinpung Government":http://places.thlib.org/features/24112/descriptions/1227 (accessed: 2016-06-17)
genealogical charts in TPS [1999] (vol. 2. table v), skyid shod sde pa'i skor, Czaja 2013 (p. 565)