@article{PIM_1975_N_S_19_33_a16,
     author = {I. Luka\v{c}evi\'c},
     title = {On {Relative} {Deformation} {And} {Vorticity} {In} {Relativistic} {Kinematics} },
     journal = {Publications de l'Institut Math\'ematique},
     pages = {101 },
     publisher = {mathdoc},
     volume = {_N_S_19},
     number = {33},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/PIM_1975_N_S_19_33_a16/}
}