@article{10_21136_CPM_1983_108409,
     author = {Chvalina, Jan},
     title = {Range closure extension of input-output relations of topological general systems},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {208--213},
     publisher = {mathdoc},
     volume = {108},
     number = {2},
     year = {1983},
     doi = {10.21136/CPM.1983.108409},
     mrnumber = {704066},
     zbl = {0514.54010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1983.108409/}
}