Barrett, T. (2002). Inner and Outer Ritual: Some Remarks on a Directive Concerning Daoist Dragon-casting Ritual from Dunhuang. In 焯. 李, & 萬. 陳 (Eds.), 道苑繽紛録 A Daoist Florilegium. A Festschrift Dedicated to Professor Liu Ts'un-yan on his Eighty-Fifth Birthday (315-334). 商務印書館