@article{MAN_1977__225_162918,
     author = {Ursula Schirmeier},
     title = {Isomorphie harmonischer {R\"aume.}},
     journal = {Mathematische Annalen},
     pages = {33--56},
     publisher = {mathdoc},
     volume = {225},
     year = {1977},
     zbl = {0319.31010},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__225_162918/}
}