@article{PPN236020595+dmdlog293, title = {GAUSS an SCHUMACHER, 1845 Juni 18}, booktitle = {Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1}, series = {GDML\_Books}, year = {1927}, pages = {395}, url = {http://dml.mathdoc.fr/item/PPN236020595+dmdlog293} }
(éd.). GAUSS an SCHUMACHER, 1845 Juni 18, dans Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1, GDML_Books, (1927), p. 395. http://gdmltest.u-ga.fr/item/PPN236020595+dmdlog293/