@article{AUCMP_1991__32_2_a0, author = {Balcar, Bohuslav}, title = {Foreword}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, publisher = {mathdoc}, volume = {32}, number = {2}, year = {1991}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1991__32_2_a0/} }