@article{NSJOM_1995_25_1a_3,
     author = {Ryb\'arik 

 J\'an},
     title = {g-functions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {29-38},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1995},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1995_25_1a_3/}
}