TY  - JOUR
AU  - R. Krastev
TI  - Approximate Values of the Integral Logarithm and the Exponential Integral Function
JO  - Mathematica balkanica
PY  - 2000
SP  - 141
VL  - 14
IS  - 1-2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_2000_14_1-2_a11/
ID  - MABA_2000_14_1-2_a11
ER  -