@article {2015,
	title = {What Do We Want To Remember? Memories in the Manuscripts of Two Dutch Monasteries: The Benedictine Abbey of Egmond and the Utrecht Charterhouse},
	journal = {The Medieval Low Countries},
	volume = {2},
	year = {2015},
	pages = {19-35},
	author = {Gumbert, J.P.}
}
@inbook {2012,
	title = {Handschriften in de bibliotheek van het Paulusklooster},
	booktitle = {De nalatenschap van de Paulusabdij in Utrecht},
	series = {Middeleeuwse Studies en Bronnen},
	volume = {130},
	year = {2012},
	pages = {91-102},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-223-3},
	author = {Gumbert, J.P.},
	editor = {Engen, Hildo van and Vliet, Kaj van}
}
@article {2011,
	title = {Een boek is een ding: Gerard Isaac Lieftinck (1902-1994)},
	journal = {Millennium},
	volume = {25},
	year = {2011},
	pages = {135-141},
	author = {Gumbert, J.P.}
}
@book {2011,
	title = {Utrecht Museum Catharijneconvent},
	series = {Illustrated Inventory of Medieval Manuscripts in Latin script in the Netherlands},
	volume = {1},
	year = {2011},
	pages = {233},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-261-5},
	author = {Gumbert, J.P.}
}
@inbook {2008,
	title = {De keurmedigen van Rinnegom},
	booktitle = {Het klooster Egmond: hortus conclusus},
	series = {Egmondse studi{\"e}n},
	volume = {5},
	year = {2008},
	pages = {45-60},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-025-3},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {2008,
	title = {Enkele opmerkingen over het Egmondse cartularium en de kleinere geschiedbronnen daarin},
	booktitle = {Het klooster Egmond: hortus conclusus},
	series = {Egmondse studi{\"e}n},
	volume = {5},
	year = {2008},
	pages = {61-70},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-025-3},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {2008,
	title = {Het Egmonds Evangeliarium: van ontstaan tot restauratie},
	booktitle = {Het klooster Egmond: hortus conclusus},
	series = {Egmondse studi{\"e}n},
	volume = {5},
	year = {2008},
	pages = {17-44},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-025-3},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {2008,
	title = {Over een lange en een korte Vita Adalberti secunda},
	booktitle = {Het klooster Egmond: hortus conclusus},
	series = {Egmondse studi{\"e}n},
	volume = {5},
	year = {2008},
	pages = {167-171},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	isbn = {978-90-8704-025-3},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {2002,
	title = {Boeken en boekhouding. Egmondse boeken onder abt Jan de Weent (1381-1404)},
	booktitle = {Boeken en handschriften uit Egmond. De abdij van Egmond. Geschreven en beschreven},
	series = {Egmondse Studi{\"e}n},
	volume = {4},
	year = {2002},
	pages = {59-72},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-707-8},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {2002,
	title = {Weer een handschrift uit Egmond boven water: Euclides},
	booktitle = {Boeken en handschriften uit Egmond. De abdij van Egmond. Geschreven en beschreven},
	series = {Egmondse Studi{\"e}n},
	volume = {4},
	year = {2002},
	pages = {73-80},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-707-8},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@article {2001,
	title = {Kleur in middeleeuwse handschriften},
	journal = {Madoc},
	volume = {15},
	year = {2001},
	chapter = {217-225},
	author = {Gumbert, J.P.}
}
@article {1999,
	title = {Het kapittelboek van de Utrechtse Mariakerk. Een van de weinige overgeleverde Noord-Nederlandse codices uit de twaalfde eeuw},
	journal = {Jaarboek voor Nederlandse boekgeschiedenis},
	volume = {6},
	year = {1999},
	pages = {31-48},
	author = {Gumbert, J.P.}
}
@inbook {1997,
	title = {De Egmondse boekenlijst},
	booktitle = {In het spoor van Egbert. Aartsbisschop Egbert van Trier, de bibliotheek en geschiedschrijving van het klooster Egmond},
	series = {Egmondse Studi{\"e}n},
	volume = {3},
	year = {1997},
	pages = {151-179},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-289-0},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {1997,
	title = {Egberts geschenken aan Egmond},
	booktitle = {In het spoor van Egbert. Aartsbisschop Egbert van Trier, de bibliotheek en geschiedschrijving van het klooster Egmond},
	series = {Egmondse Studi{\"e}n},
	volume = {3},
	year = {1997},
	pages = {24-43},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-289-0},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
@inbook {1993,
	title = {Wanneer werkte C? Over een Egmonds annalist en het Auctarium van Affligem},
	booktitle = {Egmond tussen Kerk en wereld},
	series = {Egmondse Studi{\"e}n},
	volume = {2},
	year = {1993},
	pages = {183-191},
	publisher = {Verloren},
	organization = {Verloren},
	address = {Hilversum},
	issn = {90-6550-252-1},
	author = {Gumbert, J.P.},
	editor = {Vis, G.N.M.}
}
