@article{NSJOM_1987_17_1a_11,
     author = {Herceg Dragoslav and Petrovi\'c Nenad},
     title = {On numerical solution of a singularly 

 perturbed {Boundary} value problem {II}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {163-186},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1987_17_1a_11/}
}