@article{NSJOM_1985_15_1a_21,
     author = {Stojmenovi\'c Ivan},
     title = {Symmetric functions in a maximal set of three-valued logical functions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {235-244},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1985},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1985_15_1a_21/}
}