@article{MEM_2012_41_1_a29,
     author = {Trifonov, Tihomir and Georgieva-Trifonova, Tsvetanka},
     title = {Warehousing and {OLAP} {Analysis} of {Data} {About} {Unique} {Bulgarian} {Bells}},
     journal = {Mathematics and Education in Mathematics},
     pages = {266--272},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MEM_2012_41_1_a29/}
}