@article{MM3_1997_1_1_a4,
     author = {Dragan {\DJ}ur\v{c}i\'c},
     title = {Characterizations of {Some} {Classes} of {Functions} {Related} to {Karamata} {Theory}},
     journal = {Mathematica Moravica},
     pages = {27 - 32},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1997},
     url = {https://geodesic-test.mathdoc.fr/item/MM3_1997_1_1_a4/}
}