Bakhtin was particularly interested in the use of “reported speech” [chuzháya rech']—that is, citation—in medieval literature, where “the borders between another’s and one’s own speech ere fragile, ambivalent, and frequently convoluted and confused.”
Um, that was by Solomon Volkov, from his St. Petersburg : A Cultural History. Except for the bracketed part; that was by me. I don’t know where the Bakhtin quotes are from—Volkov doesn’t footnote them.
But it doesn’t really matter, does it?