@incollection{401250, title = {``Vielleicht f\"ur menschliche Kr\"afte unausf\"uhrbar.'' A mathematical proof of a Danish astronomer?}, booktitle = {Mathematics throughout the ages}, series = {GDML\_Books}, publisher = {Prometheus}, address = {Praha}, year = {2001}, pages = {196-201}, language = {en}, url = {http://dml.mathdoc.fr/item/401250} }
Gropp, Harald. “Vielleicht für menschliche Kräfte unausführbar.” A mathematical proof of a Danish astronomer?, dans Mathematics throughout the ages, GDML_Books, (2001), pp. 196-201. http://gdmltest.u-ga.fr/item/401250/