Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1986__102_178286, author = {Charles F. Osgood}, title = {Product {Type} {Bounds} on the {Approximation} of {Values} of {E} and {G} {Functions.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {7--26}, publisher = {mathdoc}, volume = {102}, year = {1986}, zbl = {0593.10032}, url = {http://geodesic.mathdoc.fr/item/MOMA_1986__102_178286/} }
Charles F. Osgood. Product Type Bounds on the Approximation of Values of E and G Functions.. Monatshefte für Mathematik, Tome 102 (1986), pp. 7-26. http://geodesic.mathdoc.fr/item/MOMA_1986__102_178286/