@article{PIM_1969_N_S_09_23_a12,
     author = {Octavian Em. Gheorghiu},
     title = {Die {L\"osung} {Eines} {Funktionalgleichungssystems}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {93 },
     year = {1969},
     volume = {_N_S_09},
     number = {23},
     url = {http://geodesic.mathdoc.fr/item/PIM_1969_N_S_09_23_a12/}
}