@article{MZ_1986__192_173733,
     author = {Walter Philipp and William Stout},
     title = {Invariance {Principles} for {Martingales} and {Sums} of {Indpendent} {Random} {Variables.}},
     journal = {Mathematische Zeitschrift},
     pages = {253--264},
     publisher = {mathdoc},
     volume = {192},
     year = {1986},
     zbl = {0601.60033},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__192_173733/}
}