- liedboek: zingen en bidden in huis en kerk. Dutch hymnal, 2013.
- Compendium to the liedboek (Dutch hymnal, 2013).
- Deutsches Musikinformationszentrum – Musik im Christentum (thematic page)
- Gezangen voor Liturgie. Collection of Catholic liturgical hymns, 2011.
- Liturgievernieuwing [Liturgical renewal]. Database of the University of Amsterdam with new, in part unpublished, resources on the shape of the liturgy.
- HYMNOLOGI. Nordic journal for hymnology.
- Andres Mallings – Danks Salmehistorie.
- Salmehistorisk netværk – Danish network on historical hymnology.
International society for hymnological studies
Internationale Arbeitsgemeinschaft für Hymnologie (IAH) e.V. / Cercle international d'études hymnologiques