@article{NSJOM_1974_4_Nonea_1,
     author = {Ivi\'c Aleksandar},
     title = {On ceratain aritmetical functions connected with the 

 distribution of prime numbers},
     journal = {Novi Sad Journal of Mathematics},
     pages = {9-17},
     publisher = {mathdoc},
     volume = {4},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1974_4_Nonea_1/}
}