@article{CM_1937__4__346_0,
     author = {Warschawski, S.},
     title = {\"Uber die {Winkelderivierten} schlichter {Funktionen}},
     journal = {Compositio Mathematica},
     pages = {346--366},
     publisher = {Johnson Reprint Corporation},
     volume = {4},
     year = {1937},
     zbl = {0016.40701},
     language = {de},
     url = {http://www.numdam.org/item/CM_1937__4__346_0/}
}