@article{NSJOM_1985_15_1a_22,
     author = {Kolar Dragan and Stojkovi\'c Vojislav},
     title = {The implementation of 

 {CF-gramars} by {PROLOG} language},
     journal = {Novi Sad Journal of Mathematics},
     pages = {245-252},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1985},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1985_15_1a_22/}
}