@article{PIM_1960_S_S_XIV_14_a6,
     author = {Svetozar Kurepa},
     title = {The {Area} {Of} {Generalized} {Circle} {In} {The} {Hyperbolic} {Plane}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {99 },
     publisher = {mathdoc},
     volume = {_S_S_XIV},
     number = {14},
     year = {1960},
     url = {http://geodesic.mathdoc.fr/item/PIM_1960_S_S_XIV_14_a6/}
}