@inbook {2009, title = {Het venijn van broeder Ijsewijn}, booktitle = {De boeken van Velthem. Auteur, oeuvre en overlevering}, series = {Middeleeuwse studies en bronnen}, volume = {119}, year = {2009}, pages = {143-159}, publisher = {Verloren}, organization = {Verloren}, address = {Hilversum}, isbn = {978-90-8704-093-2}, author = {Scheepsma, Wybren F.}, editor = {Besamusca, Bart and Sleiderink, Remco and Warnar, Geert} }