@article{10_4064_ap_24_1_9_20,
     author = {D. Czaja-Po\'spiech and M. Kuczma},
     title = {Continuous solutions of some functional equations in the indeterminate case},
     journal = {Annales Polonici Mathematici},
     pages = {9--20},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1970},
     doi = {10.4064/ap-24-1-9-20},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-24-1-9-20/}
}