@article{ZR_1953_Knj_3_1_a3,
     author = {Milutin Milankovi\'c},
     title = {Ueber die {Ausrechnung} des {Claudius} {Ptolemaus} der {Zahl} $\pi$},
     journal = {Zbornik radova},
     pages = {11 - 14},
     publisher = {mathdoc},
     volume = {Knj. 3},
     number = {1},
     year = {1953},
     url = {http://geodesic.mathdoc.fr/item/ZR_1953_Knj_3_1_a3/}
}