@book{justhis5590,
           title = {Trait{\'e} de la nationalit{\'e} en droit belge},
          author = {C.L. Closset},
         address = {Bruxelles},
       publisher = {Larcier},
            year = {1993},
             url = {http://www.just-his.be/eprints/5590/}
}