@book{justhis2402,
           title = {La constitution belge comment{\'e}e},
          author = {F. Croquet},
         address = {Verviers},
       publisher = {Gilon},
            year = {1880},
        keywords = {r{\`e}glement reglement rule regulation verordening		
law wet loi circulaire circular omzendbrief 		
Constitution Grondwet},
             url = {http://www.just-his.be/eprints/2402/}
}