@article{SJC_2008_2_3_a5,
     author = {Radenski, Atanas},
     title = {Patterns for {Active} {E-Learning} in {CMS} {Environments}},
     journal = {Serdica Journal of Computing},
     pages = {277--294},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJC_2008_2_3_a5/}
}