@article{MZ_1978__163_172753,
     author = {Mustafa A. Akcoglu and Ulrich Krengel},
     title = {A {Differentiation} {Theorem} for {Additive} {Processes.}},
     journal = {Mathematische Zeitschrift},
     pages = {199--210},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0379.60073},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172753/}
}