@article{MZ_1965__90_170497,
     author = {Y.T. Siu},
     title = {On the solution of the equation f' (...) = ...f (g (...)).},
     journal = {Mathematische Zeitschrift},
     pages = {391--392},
     publisher = {mathdoc},
     volume = {90},
     year = {1965},
     zbl = {0128.30702},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170497/}
}