@article{MAN_1950__122_160195,
     author = {Gustav Herglotz},
     title = {Eine {Formel} der formalen {Operatorenrechnung}},
     journal = {Mathematische Annalen},
     pages = {14--15},
     publisher = {mathdoc},
     volume = {122},
     year = {1950},
     zbl = {0036.35602},
     url = {http://geodesic.mathdoc.fr/item/MAN_1950__122_160195/}
}