@article{NSJOM_1980_10_Nonea_22,
     author = {Gilezan Kariolan},
     title = {Differentials of generalized 

 {pseudo-Bollean} functions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {185-190},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_22/}
}