@article{MZM_1989_45_2_a18,
     author = {V. V. Dyakin and V. Ya. Raevskii},
     title = {Properties of the operators of classical potential theory},
     journal = {Matemati\v{c}eskie zametki},
     pages = {138--140},
     year = {1989},
     volume = {45},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_2_a18/}
}