@article{MV_1968_20_4_a4,
     author = {Dj. Kurepa},
     title = {Programiranje i jedan {Petrovi\'cev} problem o ekstremima},
     journal = {Matemati\v{c}ki vesnik},
     pages = {419 },
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MV_1968_20_4_a4/}
}