@article{JRAM_1980__320_152302,
     author = {Siegfried Graf},
     title = {A {Radon-Nikodym} theorem for capacities.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {192--214},
     publisher = {mathdoc},
     volume = {320},
     year = {1980},
     zbl = {0434.31004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__320_152302/}
}