@article{NSJOM_1975_5_Nonea_2,
     author = {Nikoli\'c-Despotovi\'c Danica},
     title = {The continuity~ 

 in the point of one class of operational functions,},
     journal = {Novi Sad Journal of Mathematics},
     pages = {13-18},
     publisher = {mathdoc},
     volume = {5},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1975_5_Nonea_2/}
}