@article{NSJOM_1990_20_1a_6,
     author = {Ivi\'c Aleksandar},
     title = {On the k-th prime factor 

 of an integer},
     journal = {Novi Sad Journal of Mathematics},
     pages = {63-73},
     year = {1990},
     volume = {20},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1990_20_1a_6/}
}