@article{BSMF_1879__7__72_1,
     author = {Laguerre},
     title = {Sur l{\textquoteright}int\'egrale $\int _x^{\infty } \frac{e^{-x}dx}{x}$},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {72--81},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {7},
     year = {1879},
     doi = {10.24033/bsmf.157},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.157/}
}