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@article{MAN_1871__4_156519, author = {Lommel}, title = {Zur {Theorie} der {Bessel'schen} {Functionen}}, journal = {Mathematische Annalen}, pages = {103--116}, publisher = {mathdoc}, volume = {4}, year = {1871}, zbl = {03.0221.04}, url = {http://geodesic.mathdoc.fr/item/MAN_1871__4_156519/} }
Lommel. Zur Theorie der Bessel'schen Functionen. Mathematische Annalen, Tome 4 (1871), pp. 103-116. http://geodesic.mathdoc.fr/item/MAN_1871__4_156519/