@article{MV_1964_16_2_a11,
     author = {R. Stojanovi\'c},
     title = {O operatoru momenta koli\v{c}ine kretanja},
     journal = {Matemati\v{c}ki vesnik},
     pages = {156 },
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1964},
     url = {http://geodesic.mathdoc.fr/item/MV_1964_16_2_a11/}
}