@inbook {2004,
	title = {De Ordinarius van Sint-Salvator: codicologische en editietechnische aspecten},
	booktitle = {Meer dan muziek alleen. In memoriam Kees Vellekoop},
	series = {Utrechtse Bijdragen tot de Medi{\"e}vistiek},
	volume = {20},
	year = {2004},
	pages = {87-111},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-776-0},
	author = {Gerritsen-Geywitz, Gisela and Gerritsen, Willem Pieter},
	editor = {Stuip, Ren{\'e} E.V.}
}
