1
Published: 1975.
Superior document: Mediaevalia Lovaniensia
2
Published: 1995.
3
Published: 1995
Superior document: Symbolae Facultatis Litterarum Lovaniensis : Series A 18
4
Published: 1995
Superior document: Mediaevalia Lovaniensia : Series 1, Studia 24
5
Published: 1988.