Geodesic
On the range of the Euler function
Vladikavkazskij matematičeskij žurnal, Tome 1 (1999) no. 1, pp. 53-55 
B. G. Tasoev. On the range of the Euler function. Vladikavkazskij matematičeskij žurnal, Tome 1 (1999) no. 1, pp. 53-55. http://geodesic.mathdoc.fr/item/VMJ_1999_1_1_a6/
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Bukhshtab A. A., Teoriya chisel, Prosveschenie, M., 1966 | Zbl

[2] Devenport G., Multiplikativnaya teoriya chisel, Nauka, M., 1971 | MR