@article{NSJOM_1981_11_Nonea_12,
     author = {Herceg 

 Dragoslav and Vulanovi\'c Relja},
     title = {Some 

 finite-difference schemes for a singular perturbation problem on a 

 non-uniform mesh},
     journal = {Novi Sad Journal of Mathematics},
     pages = {117-134},
     publisher = {mathdoc},
     volume = {11},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1981_11_Nonea_12/}
}