@article{10_4064_ap_40_2_109_114,
     author = {Uhland Burkart},
     title = {Verallgemeinerte {Schroedergleichung} und {Pr\"a-Schroedergleichungen}},
     journal = {Annales Polonici Mathematici},
     pages = {109--114},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1981},
     doi = {10.4064/ap-40-2-109-114},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-40-2-109-114/}
}