@article{NSJOM_2010_40_1a_6,
     author = {Mirko Budin\v{c}evi\'c},
     title = {A comparision theorem of differential
 equations},
     journal = {Novi Sad Journal of Mathematics},
     pages = {3-8},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_1a_6/}
}