@book{justhis2342,
           title = {Trait{\'e} de droit public belge. Droit constitutionnel. Droit administratif},
          author = {Paul Errera},
         address = {Paris},
       publisher = {M. Giard \& G. Bri{\`e}re},
            year = {1918},
        keywords = {Constitution Grondwet law wet loi administratif administratief administrative        
},
             url = {http://www.just-his.be/eprints/2342/}
}