@article{CSIS_2012_9_2_a3,
     author = {Dragan Mili\'cev},
     title = {Towards {Understanding} of {Classes} versus {Data} {Types} in {Conceptual} {Modeling} and {UML}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2012_9_2_a3/}
}