[Forte 2005] Forte, Antonino. Political Propaganda and Ideology in China at the End of the Seventh Century: An Inquiry into the Nature, Authors, and Function of the Dunhuang Document S.6502 Followed by an Annotated Translation. Second Edition. Kyoto: Scuola Italiana di Studi sull’Asia Orientale, 2005.
— passim
Forte's entire monograph is a study of the authorship, circumstances of composition, and nature of S.6502. On the question of authorship, see esp. Ch. 2, in which he argues that it was the product of a group of "Ten Bhadantas" who were active under Wu Zetian as propagandists and ideologues. Forte's basic contention is that the commentary was part of a strategy to use the *Mahāmegha, and especially a prophecy it contained about a kind of female "wheel-turning king", to legitimate Wu Zetian's rule.