@article{MAN_1882__19_157011,
     author = {Leonhardt},
     title = {Integraleigenschaften der adjungirten {Kegelfunctionen.}},
     journal = {Mathematische Annalen},
     pages = {578--587},
     publisher = {mathdoc},
     volume = {19},
     year = {1882},
     url = {http://geodesic.mathdoc.fr/item/MAN_1882__19_157011/}
}