Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_2000_14_1-2_a11, author = {R. Krastev}, title = {Approximate {Values} of the {Integral} {Logarithm} and the {Exponential} {Integral} {Function}}, journal = {Mathematica balkanica}, pages = {141}, publisher = {mathdoc}, volume = {14}, number = {1-2}, year = {2000}, url = {http://geodesic.mathdoc.fr/item/MABA_2000_14_1-2_a11/} }
R. Krastev. Approximate Values of the Integral Logarithm and the Exponential Integral Function. Mathematica balkanica, Tome 14 (2000) no. 1-2, p. 141. http://geodesic.mathdoc.fr/item/MABA_2000_14_1-2_a11/