changes.mady.by.user Arthur Aslanyan (Nafta College)
Saved on Mar 23, 2019
...
https://www.wolframalpha.com/input/?i=Ei(x)
https://www.researchgate.net/publication/323772322_A_review_on_the_Exponential-Integral_special_function_and_other_strictly_related_special_functions_Lectures_from_a_seminar_of_Mathematical_Physics
https://www.dropbox.com/s/4hijnldvyhsx0bz/Enrico%20Masina%2C%20A%20review%20on%20the%20Exponential-Integral%20special%20function%20and%20other%20strictly%20related%20special%20functions.pdf?dl=0