@article{NSJOM_1989_19_1a_1,
     author = {Vulanovi\'c Relja},
     title = {On numerical solution of a turning 

 point problem},
     journal = {Novi Sad Journal of Mathematics},
     pages = {11-24},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1989_19_1a_1/}
}