Ph.D. Student Özlem Eren has published a case study about the Russian triptych with the Mandylion (1637), currently located in the Metropolitan Museum of Art in New York City, in the Bloomsbury Medieval Studies’ The Encyclopedia of the Global Middle Ages. With the UW–Madison library’s trial subscription it can be accessed until October 18th.
UW–Madison’s trial to this resource is: https://ezproxy.library.wisc.edu/login?url=https://www.bloomsburymedievalstudies.com