@article{MM2_1998__95_3_156386,
     author = {Fritz Grunewald and Stefan K\"uhnlein},
     title = {On the proof of {Humbert's} volume formula.},
     journal = {Manuscripta mathematica},
     pages = {431--436},
     publisher = {mathdoc},
     volume = {95},
     number = {3},
     year = {1998},
     zbl = {0897.11013},
     url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156386/}
}