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@article{KJM_2007_30_1_a5, author = {Ljubica Dikovi\'c and Du\v{s}an Stefanovi\'c}, title = {The math portals}, journal = {Kragujevac Journal of Mathematics}, pages = {89 - 97}, publisher = {mathdoc}, volume = {30}, number = {1}, year = {2007}, url = {http://geodesic.mathdoc.fr/item/KJM_2007_30_1_a5/} }
Ljubica Diković; Dušan Stefanović. The math portals. Kragujevac Journal of Mathematics, Tome 30 (2007) no. 1. http://geodesic.mathdoc.fr/item/KJM_2007_30_1_a5/