@article{MZ_1957__67_169672,
     author = {Friedrich Wilhelm Sch\"afke},
     title = {Integrale \"uber {Produkte} von {Sph\"aroidfunktionen.}},
     journal = {Mathematische Zeitschrift},
     pages = {238--251},
     publisher = {mathdoc},
     volume = {67},
     year = {1957},
     zbl = {0080.27402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169672/}
}