Per K. Sørensen, Restless Relic, the Ārya Lokeśvara Icon in Tibet: Symbol of Power, Legitimacy and Pawn for Patronage, contained in: B. Kellner, H. Krasser, H. Lasic, M.T. Much & H. Tauscher, eds., Pramāṇakīrtiḥ: Papers Dedicated to Ernst Steinkellner on the Occasion of His 70th Birthday, Wiener Studien zur Tibetologie und Buddhismuskunde no. 70 (Vienna 2007), pp. 857 885.