@article{ZR_1976_1_9_a2,
     author = {Karol Baron},
     title = {On {Extending} of {Solutions} of {Functional} {Equations} in a {Single} {Variable}},
     journal = {Zbornik radova},
     pages = {23 },
     year = {1976},
     volume = {1},
     number = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_1976_1_9_a2/}
}