@article{ZR_1959_Knj_7_1_a3,
     author = {Vaclav Vodi\v{c}ka},
     title = {\"Uber eine {Formel} der {Elementarmathematik}},
     journal = {Zbornik radova},
     pages = {93 - 98},
     publisher = {mathdoc},
     volume = {Knj. 7},
     number = {1},
     year = {1959},
     url = {http://geodesic.mathdoc.fr/item/ZR_1959_Knj_7_1_a3/}
}