@article{NSJOM_1978_8_Nonea_6,
     author = {Taka\v{c}i Arpad},
     title = {On the field of 

 exponential operators},
     journal = {Novi Sad Journal of Mathematics},
     pages = {41-46},
     publisher = {mathdoc},
     volume = {8},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1978_8_Nonea_6/}
}