@article{IM2_2003_67_4_a6,
     author = {M. E. Changa},
     title = {Numbers whose prime divisors lie in special intervals},
     journal = {Izvestiya. Mathematics},
     pages = {837--848},
     year = {2003},
     volume = {67},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2003_67_4_a6/}
}