@article{VSGU_2010_2_a4,
     author = {Yu. A. Parfenova},
     title = {Vector transformation operators for harmonic functions in a~ball},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {48--56},
     publisher = {mathdoc},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2010_2_a4/}
}