@book {2007, title = {In de schaduw van de keizer. Hendrik van Veldeke en zijn tijd. 1130-1230}, year = {2007}, pages = {204}, publisher = {Walburg Pers}, organization = {Walburg Pers}, address = {Zutphen}, issn = {90-5730-528-3}, author = {Janssens, Jozef D.} }