@article{IM2_1976_10_5_a7,
     author = {S. G. Samko},
     title = {On spaces of {Riesz} potentials},
     journal = {Izvestiya. Mathematics },
     pages = {1089--1117},
     publisher = {mathdoc},
     volume = {10},
     number = {5},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1976_10_5_a7/}
}