@article{JRAM_1840__21_147125,
     author = {Th. Clausen},
     title = {Vier neue mondf\"ormige {Fl\"achen,} deren {Inhalt} quadrirbar ist.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {375--376},
     publisher = {mathdoc},
     volume = {21},
     year = {1840},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1840__21_147125/}
}