@article{NM_1994_XXXIX_1-4_a4,
     author = {Ljubinka Petkovi\'c},
     title = {Uvo{\dj}enje nove promenljive},
     journal = {Nastava matematike},
     pages = {24 },
     publisher = {mathdoc},
     volume = {XXXIX},
     number = {1-4},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NM_1994_XXXIX_1-4_a4/}
}