Mathes, Klaus-Dieter (2011): The Collection Of “Indian Mahāmudrā Works” (Tib. Phyag Chen Rgya Gzhung ) Compiled By The Seventh Karma Pa Chos Grags Rgya Mtsho. In: Jackson/Kapstein: Mahamudra and the Bka‘-brgyud Tradition, pp 108ff
Mathes, Klaus-Dieter (2011): The Collection Of “Indian Mahāmudrā Works” (Tib. Phyag Chen Rgya Gzhung ) Compiled By The Seventh Karma Pa Chos Grags Rgya Mtsho. In: Jackson/Kapstein: Mahamudra and the Bka‘-brgyud Tradition, pp 108ff