@article{MASLO_2005__55_4_a5, author = {Kostyrko, Pavel and Ma\v{c}aj, M. and \v{S}al\'at, Tibor and Sleziak, Martin}, title = {$\Cal I$-convergence and extremal $\Cal I$-limit points}, journal = {Mathematica slovaca}, pages = {443--464}, publisher = {mathdoc}, volume = {55}, number = {4}, year = {2005}, mrnumber = {2181783}, zbl = {1113.40001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_2005__55_4_a5/} }