@article{PPN236020595+dmdlog127, title = {14. GAUSS an ENCKE, 1840 September 17}, booktitle = {Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1}, series = {GDML\_Books}, year = {1927}, pages = {154}, url = {http://dml.mathdoc.fr/item/PPN236020595+dmdlog127} }
(éd.). 14. GAUSS an ENCKE, 1840 September 17, dans Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1, GDML_Books, (1927), p. 154. http://gdmltest.u-ga.fr/item/PPN236020595+dmdlog127/