@article{ZR_1984_4_12_a12,
     author = {Marko D. Leko},
     title = {The {Plane-Time} in {Which} {Paths} of {Inertional} {Motions} {Are} {Conics}},
     journal = {Zbornik radova},
     pages = {113 },
     publisher = {mathdoc},
     volume = {4},
     number = {12},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_1984_4_12_a12/}
}