@article{MV_1971_23_1_a47,
     author = {V. Vui\v{c}i\v{c}},
     title = {Ob odnoj vozmo\v{z}nosti predstavleniya kovariantnyh i kontravariantnyh koordinat vektora skorosti},
     journal = {Matemati\v{c}ki vesnik},
     pages = {387 },
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/MV_1971_23_1_a47/}
}