@article{TSG_1987-1988__6__39_0,
     author = {Molzon, Robert},
     title = {Sym\'etrie et probl\`eme aux limites pour l'op\'erateur de {Laplace} dans les cas h\'emisph\'erique et hyperbolique},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {39--40},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {6},
     year = {1987-1988},
     zbl = {1002.58516},
     language = {fr},
     url = {http://www.numdam.org/item/TSG_1987-1988__6__39_0/}
}