Mahāmudrā (Tantric rite) -- Early works to 1800 : Short Dorjé Chang Mahāmudrā Invocation by Bängar Jampäl Zangpo with commentaries by 8th Karmapa Mikyö Dorjé, Karma Chagmé, 15th Karmapa Khakhyab Dorjé, Rinchen Dargyä, Gänpo Tshepäl and life-story of the author by 8th Karmapa Mikyö Dorjé