@article{10_4064_aa_61_2_143_159, author = {A. Smati}, title = {Evaluation effective du nombre d'entiers n tels que \ensuremath{\varphi}(n) \ensuremath{\leq} x}, journal = {Acta Arithmetica}, pages = {143--159}, publisher = {mathdoc}, volume = {61}, number = {2}, year = {1992}, doi = {10.4064/aa-61-2-143-159}, language = {fr}, url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-61-2-143-159/} }