@article{MAN_1975__215_162701,
     author = {Anne Drinkwater Roberts},
     title = {Integral {Representation} for {Multiply} {Superharmonic} {Functions.}},
     journal = {Mathematische Annalen},
     pages = {69--78},
     publisher = {mathdoc},
     volume = {215},
     year = {1975},
     zbl = {0286.31010},
     url = {http://geodesic.mathdoc.fr/item/MAN_1975__215_162701/}
}