@article{YJOR_1999_9_1_a10,
     author = {Slobodanka Jankovi\'c},
     title = {How to {Distinguish} {Between} {Record} {Types}},
     journal = {Yugoslav journal of operations research},
     pages = {141 },
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1999},
     zbl = {0956.60047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_1999_9_1_a10/}
}