@misc{MZ_1925__23_167859,
     title = {Walther, {A.,} {\"Uber} die reellen {Nullstellen} der unvollst\"andigen {Gammafunktion} {P(z)}},
     journal = {Mathematische Zeitschrift},
     pages = {238--245},
     publisher = {mathdoc},
     volume = {23},
     year = {1925},
     zbl = {51.0277.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1925__23_167859/}
}