@article{MV_1971_23_1_a6,
     author = {R. Daci\'c},
     title = {Solution of a {G.} {Kurepa's} problem},
     journal = {Matemati\v{c}ki vesnik},
     pages = {41 },
     year = {1971},
     volume = {23},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1971_23_1_a6/}
}