ISBN 0-333-37185-2* Olson, Roberta J.M., Italian Renaissance Sculpture, 1992, Thames & Hudson (World of Art), ISBN 0500202531* Robinson, James, Masterpieces of Medieval Art, 2008, British Museum Press, ISBN 978-0-7141-2815-3* Snyder, James.
ISBN 0333371852* Olson, Roberta J.M., "Italian Renaissance Sculpture", 1992, Thames & Hudson (World of Art), ISBN 978-0-500-20253-1* Robinson, James, "Masterpieces of Medieval Art", 2008, British Museum Press, ISBN 978-0-7141-2815-3*Snyder, James.