@article{NSJOM_1973_3_Nonea_3,
     author = {Had\v{z}i\'c Olga},
     title = {Generalization of a theorem of {Marinescu}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {35-39},
     publisher = {mathdoc},
     volume = {3},
     year = {1973},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1973_3_Nonea_3/}
}