@article{GDZPPN002245299, title = {Zur Theorie der Bessel'schen Functionen.}, journal = {Mathematische Annalen}, volume = {16}, year = {1880}, pages = {183-208}, zbl = {12.0773.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002245299} }
Lommel. Zur Theorie der Bessel'schen Functionen.. Mathematische Annalen, Tome 16 (1880) pp. 183-208. http://gdmltest.u-ga.fr/item/GDZPPN002245299/