@article{JRAM_1964__216_150654,
     author = {Kurt-R. Biermann},
     title = {Thomas {Clausen,} {Mathematiker} und {Astronom.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {159--198},
     publisher = {mathdoc},
     volume = {216},
     year = {1964},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1964__216_150654/}
}