@article{VMUMM_2008_6_a7,
     author = {A. Kh. Ghiyasi},
     title = {Constants in inequalities for mean values of some periodic arithmetic functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {44--48},
     publisher = {mathdoc},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2008_6_a7/}
}