@article{MV_1968_20_2_a2,
     author = {Z. Vrcelj},
     title = {Uop\v{s}tavanje pojma prostornih izvoda},
     journal = {Matemati\v{c}ki vesnik},
     pages = {150 },
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MV_1968_20_2_a2/}
}