@article{MAN_1899__52_157955,
     author = {J. Wellstein},
     title = {Zur {Theorie} der {Functionenclasse} s3 = (z?a1) (z?a2) (z?a{\textdegree})},
     journal = {Mathematische Annalen},
     pages = {440--448},
     publisher = {mathdoc},
     volume = {52},
     year = {1899},
     zbl = {30.0409.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1899__52_157955/}
}