@article{MABA_2011_25_5_a2,
     author = {G. Bogdanova and T. Todorov and N. Noev},
     title = {Semantic model of digital resources of {Bulgarian} bells},
     journal = {Mathematica balkanica},
     pages = {483},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/MABA_2011_25_5_a2/}
}