Lotharingian
| Author(s) | Title | Reference | |
|---|---|---|---|
| Karl Leyser | The medieval foundations of England, by G. O. Sayles | 19/, p. 90 | |
| NIGEL WILKINS | The Old French Crusade Cycle. Vol. I. La Naissance du Chevalier au Cygne, by E. J. Mickel Jr., J. A. Nelson | 48/2, p. 295 |