@article{10_4064_ap_37_1_71_91,
     author = {Zygfryd Kominek},
     title = {Some theorems on differentiable solutions of a system of functional equations of n-th order},
     journal = {Annales Polonici Mathematici},
     pages = {71--91},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1980},
     doi = {10.4064/ap-37-1-71-91},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-37-1-71-91/}
}