@article{SJC_2010_4_4_a5,
     author = {Valcheva, Donika and Todorova, Margarita and Asenov, Oleg},
     title = {A {3D} {Model} as a {Tool} for {Increasing} the {Effectiveness} of {E-Learning}},
     journal = {Serdica Journal of Computing},
     pages = {475--486},
     publisher = {mathdoc},
     volume = {4},
     number = {4},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJC_2010_4_4_a5/}
}