@article{MS2_1991__69_1_167183,
     author = {N.A. Watson},
     title = {Mean values of subharmonic functions over {Green} spheres.},
     journal = {Mathematica Scandinavica},
     pages = {307--319},
     publisher = {mathdoc},
     volume = {69},
     number = {1},
     year = {1991},
     zbl = {0769.31001},
     url = {http://geodesic.mathdoc.fr/item/MS2_1991__69_1_167183/}
}