%0 Journal Article %A WawrzyƄczyk, Antoni %T Subsets of nonempty joint spectrum in topological algebras %J Mathematica Bohemica %D 2018 %P 441-448 %V 143 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.2018.0098-17/ %R 10.21136/MB.2018.0098-17 %G en %F 10_21136_MB_2018_0098_17