@article{NSJOM_1981_11_Nonea_22,
     author = {Gilezan 

 Kariolan},
     title = {Some 

 properties of linear operations of discrete functions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {247-252},
     publisher = {mathdoc},
     volume = {11},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1981_11_Nonea_22/}
}