Leroy, M.  (1999).  The thirteenth-century Middle Dutch charters (1272-1300) of Saint John's hospital in Brugge. A diplomatic and palaeographic approach. In W. P.  Blockmans, Boone, M., & de Hemptinne, T. (Red.), Secretum scriptorum. Liber alumnorum Walter Prevenier (pp. 93-128). Leuven: Garant.