@inbook {2012, title = {Urbain II et la r{\'e}sistance {\`a} la cr{\'e}ation du dioc{\`e}se d{\textquoteright}Arras}, booktitle = {Schismes, dissidences, oppositions : la France et le Saint-Si{\`e}ge avant Boniface VIII}, series = {{\'E}tudes et documents pour une Gallia Pontificia}, volume = {7}, year = {2012}, pages = {95-106}, publisher = {{\'E}cole nationale des chartes-Institut historique allemand}, organization = {{\'E}cole nationale des chartes-Institut historique allemand}, address = {Paris}, isbn = {978-2-35723-030-9}, author = {K{\'e}ry, Lotte}, editor = {Barbiche, Bernard and Gro{\ss}e, Rolf} }