an introduction to the principles and concepts of Indo-Tibetan scholasticism by {sa skya paN Di ta kun dga' rgyal mtshan}
byis pa bde blag tu 'jug pa'i rnam par bshad pa mkhas pa 'jug pa'i sgo - an introduction to the principles of Tibetan Buddhist scholasticism; by {sa skya paN Di ta kun dga' rgyal mtshan} (1182-1251)