@article{10_4064_ap_27_2_121_128,
     author = {Z. Krzeszowiak},
     title = {On differentiable solutions of the functional equation \ensuremath{\varphi}(f(x)) = g(x, \ensuremath{\varphi}(x)) for vector-valued functions},
     journal = {Annales Polonici Mathematici},
     pages = {121--128},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1972},
     doi = {10.4064/ap-27-2-121-128},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-27-2-121-128/}
}