1Ishihama Yumiko:Japanes Research on Tibetan History, 1985- 98. Originally written in Japanese;translated by Rolf W.Giebel. Asian Research Trends. P19 - 33.
2Fukuda Yoichi :Japanese Research on Tibetan Buddhism, 1984 - 98. Originally written in Japanese; translated by Roll W. Giebel. Asian Research Trends. P1 - 18. 1999.
