@article{MZ_1929__29_168065,
     author = {Rosalind Cecily Young},
     title = {Functions of .... defined by addition or functions of intervals in n-dimensional formulation.},
     journal = {Mathematische Zeitschrift},
     pages = {171--216},
     publisher = {mathdoc},
     volume = {29},
     year = {1929},
     zbl = {54.0273.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1929__29_168065/}
}