@article{Chiccoli:1990:AEI,
author = {Chiccoli, C. and Lorenzutta, S. and Maino, G.},
title = {An algorithm for exponential integrals of real order},
journal = {Computing},
fjournal = {Computing. Archives for Scientific Computing},
volume = {45},
year = {1990},
number = {3},
pages = {269–276},
note = {Includes Fortran code},
issn = {0010-485X},
coden = {CMPTA2},
mrclass = {65D15},
mrnumber = {MR1080796 (91i:65030)},
doi = {10.1007/BF02250638},
zblno = {0725.65021}}