@article{MV_1950_2_1-2_a2,
     author = {D. Markovi\'c},
     title = {O nekim ograni\v{c}enjima modula jednog zbira},
     journal = {Matemati\v{c}ki vesnik},
     pages = {31 },
     year = {1950},
     volume = {2},
     number = {1-2},
     url = {http://geodesic.mathdoc.fr/item/MV_1950_2_1-2_a2/}
}