Die Urkunden Heinrich Raspes und Wilhelms von Holland / bearbeitet von Doeter Hägermann und Jaap G. Kruisheer ; unter Mitwirkung von Alfred Gawlik. - Hägermann, Dieter, 1939- (OLS)http://pul/name/23425; Kruisheer, Jaap G., 1933- (OLS)http://pul/name/23426; Gawlik, Alfred. (OLS)http://pul/name/13400 (Hahnsche Buchhandlung, 1989)
In testa al front: Urkunden der deutschen Könige und Kaiser

Looking again at the question of the liturgy with Cardinal Ratzinger : proceedings of the July 2001 Fontgombault liturgical conference / edited by Alcuin Reid. - Giornate liturgiche di Fontgombault. (OLS)http://pul/name/112480; Reid, Alcuin, O.S.B. (OLS)http://pul/name/65015 (Sant Michael's Abbey, 2003)
Bibliografia in nota.