@article{GDZPPN002241323, title = {Zur Theorie der Bessel'schen Functionen}, journal = {Mathematische Annalen}, volume = {3}, year = {1871}, pages = {103-116}, zbl = {03.0221.04}, url = {http://dml.mathdoc.fr/item/GDZPPN002241323} }
Lommel. Zur Theorie der Bessel'schen Functionen. Mathematische Annalen, Tome 3 (1871) pp. 103-116. http://gdmltest.u-ga.fr/item/GDZPPN002241323/