changes.mady.by.user Arthur Aslanyan (Nafta College)
Saved on Mar 23, 2019
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https://www.wolframalpha.com/input/?i=Ei(x)
https://www.researchgate.net/publication/323772322_A_review_on_the_Masina, Enrico. (2017). 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