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Watanabe, Shōgo. (1991) 「般若心経成立論序説」 『仏教学』 “An introduction to the Theory on the Formation of the Prajñā-hridaya-sūtra,” Journal of Buddhist Studies 31, (July): 41-86. [Japanese] Presents the Heart Sutra as a 偽経 or “fake sutra”. 

Watanabe, Shōgo 渡辺章悟. (2009) 般若心経 : テクスト・思想・文化 . Hannya shingyō : tekusuto, shisō, bunka (Heart Sutra: Text, Thought, Culture)大法輪閣, Tōkyō : Daihōrinkaku, Heisei 21. [Japanese]

Watanabe, Shōgo 渡辺章悟 and Takahashi, Hisao 高橋尚夫. (2016). 般若心経註釈集成〈インド・チベット編〉. Hannya shingyō chūshaku shūsei. Indo, Chibetto hen. (Prajñā Heart Sutra Collected Comments [India/ Tibet]).  起心書房, Urayasu-shi : Kishin Shobō, Heisei 28. [Japanese]

Wayman, Alex. “Secret of the Heart Sutra.” In Prajñāpāramitā and Related Systems: Studies in Honor of Edward Conze. Edited by Lewis R. Lancaster, Luis O. Gómez, 135 – 152. Group in Buddhist Studies, UC Berkeley, 1977. Also in Buddhist Insight: Essays. Edited by George R. Elder, 307-326. Motilal Banarsidass, 1984.

Weinstein, Stanley. (1959). ‘A Biographical Study of Tz’ŭ-ên [i.e. Kuījī].’ Monumenta Nipponica 15(1/2): 119-149.

Willemen, Charles. 2021. “About the Early History of the Heart Sūtra“. In Illuminating the Dharma: Buddhist Studies in Honour of Venerable Professor KL Dhammajoti: 457-66. Edited by Toshiichi Endo. Centre of Buddhist Studies, The University of Hong Kong.

Willemen, Charles. 2021. “Zhu Daosheng 竺道生 (ca.360–434 AD) and the Heart Sūtra.” Journal of Buddhist Studies, XVII.

Yang Yiwu. (2003)  Yunju Temple. Huawen Publishing House, 2003. [杨亦武. (2003) 云居寺. 华文出版社.]

Yu, Pauline et al (eds.) (2000) Ways With Words: Writing About Reading texts From Early China. University of California Press. [Chapter 4. contains discussions of the text by various scholars].

Zacchetti, Stefano. (2005) In Praise of the Light: A Critical Synoptic Edition with an Annotated Translation of Chapters 1-3 of Dharmarakṣa’s Guang zan jing, Being the Earliest Chinese Translation of the Larger Prajñāpāramitā. (Bibliotheca Philologica et Philosophica Buddhica, 8). IRIAB. Sanskrit text also available from Gretil.

Zacchetti, Stefano. (2016). ‘The Catalog of All Canonical Scriptures’, in Claudia Wenzel and Sun Hua (eds.), Buddhist Stone Sutras in China – Sichuan Province, volume 3 Wofoyuan Section C: 65-96. Wiesbade: Harrassowitz Verlag – Hangzhou: China Academy of Arts Press.

Ziegler, Harumi Hirano. (2015). The Collection for the Propagation and Clarification of Buddhism, Vol. I. [Trans of Hongming ji (弘明集), T 2102]. BDK America.

Zhang, Shuheng. 2019. “The Reins of Language: The Mantra of the Heart Sutra in The Journey to the West.” Sino-Platonic Papers, 286: 1-61.

Zürcher, Eric. (1959). The Buddhist Conquest of China: The Spread and Adaptation of Buddhism in Early Medieval China. Leiden: E. J. Brill.

རྒྱ་གར་སྐད་དུ། བྷ་ག་བ་ཏཱི་པྲཛྙཱ་པཱ་ར་མི་ཏཱ་ཧྲྀ་ད་ཡ། (rgya gar skad du | bha ga ba ti pradznyā pā ra mi tā hri da ya) = Ārya Bhagavatī Prajñāpāramitā-hṛdaya. Long Text Heart Sutra in the Tibetan Kangyur, Derge Edition, Vol. 34: 144b.6-146a.3. Tibetan & Himalayan Library.