Bibliography : The Ostrich and the Thamur
| Nathan Ausubel | King Solomon and the Worm |
| Sabine Baring-Gould | Curious myths of the Middle Ages |
| Katherine Helen Colquhoun | A critical edition of the Middle English translation of Speculum Humanae Salvationis |
| Gervase of Tilbury; S. E. Banks, J. W. Binns, ed. | Gervase of Tilbury - Otia Imperialia - Recreation for an Emperor |
| Gervase of Tilbury; Felix Liebrecht, ed. | Des Gervasius von Tilbury Otia imperialia |
| Ilan Kogan | Hebraic Beasts and Where to Find Them Part 5: The Shamir |
| Efraim Palvanov | Mystery of the Shamir |
| Paul Perdrizet | Etude sur le Speculum humanae salvationis |
| Warburg Institute | The ostrich dissolves a glass vessel with the blood of a worm |
| John Wycliffe; James Henthorn Todd, ed. | The last age of the Church |
