| Author | Timothy Verdon and John Henderson (eds) |
| Title | Christianity and the Renaissance |
| Date | 1990 |
| Publisher | Syracuse University Press |
| City | Syracuse, New York |
| Author | Ilse E. Friesen |
| Title | The female crucifix: images of St. Wilgefortis since the Middle Ages |
| Note | Tracing the origins of the depictions of the saint from the Volto Santo crucifix (see above), through the emergence of increasingly feminised crucifixes during the subsequent centuries. |
| Date | 2001 |
| Publisher | Wilfrid Laurier University Press |
| City | Waterloo, Ontario |