@article{GMJ_1996__3_5_47837,
     author = {Gogatishvili, A. and Kokilashvili, V.},
     title = {Criteria of strong type two-weighted inequalities for fractional maximal functions.},
     journal = {Georgian mathematical journal},
     pages = {423--446},
     year = {1996},
     volume = {3},
     number = {5},
     zbl = {0884.42015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1996__3_5_47837/}
}