@article{CMH_1960__34_139189,
     author = {Roger Bader and Werner S\"orensen},
     title = {Formes harmoniques sur une surface de {RIEMANN.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {140--174},
     publisher = {mathdoc},
     volume = {34},
     year = {1960},
     zbl = {0125.31801},
     url = {http://geodesic.mathdoc.fr/item/CMH_1960__34_139189/}
}