British Museum collection database, 1935,0713.2, "Four standing women; one in foreground with a bowl balanced on her head, ....", a study for the late Visitation in Sta Maria della Pace.
Dunkerton, J., Howard, H. "Sebastiano del Piombo's Raising of Lazarus: A History of Change", pp. 33–44, 36 quoted, 2009, National Gallery Technical Bulletin, Vol 30, pp 26–51, online text
