@article{IM_1980__62_142775,
     author = {A. Hulanicki and F. Ricci},
     title = {A {Tauberian} {Theorem} and {Tangential} {Convergence} for {Bounded} {Harmonic} {Functions} on {Balls} in ...n.},
     journal = {Inventiones mathematicae},
     pages = {325--332},
     publisher = {mathdoc},
     volume = {62},
     year = {1980},
     zbl = {0449.31008},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__62_142775/}
}