@article{etna_vol35_pp185-200, author = {Ivo Marek and Petr Mayer and Ivana Pultarov\'a}, title = {Convergence issues in the theory and practice of iterative aggregation/disaggregation methods}, journal = {Electron. Trans. Numer. Anal.}, volume = {35}, year = {2009}, pages = {185--200}, }