@article{NSJOM_2002_32_1a_3,
     author = {E. Pap},
     title = {s-null-additive set functions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {47-57},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {2002},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2002_32_1a_3/}
}