@article{10_4064_aa_49_1_21_33,
     author = {Aleksandar Ivi\'c},
     title = {On some estimates involving the number of prime divisors of an integer},
     journal = {Acta Arithmetica},
     pages = {21--33},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1987},
     doi = {10.4064/aa-49-1-21-33},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-49-1-21-33/}
}