@book {2021, title = {De bijl van Sint-Olav. Op zoek naar Noorse kerkschatten in de Nederlanden }, year = {2021}, pages = {272}, publisher = {Walburg Pers}, organization = {Walburg Pers}, address = {Zutphen}, isbn = {9789462496545}, author = {Sicking, Louis H.J.} }