%0 Journal Article %A W. Żelazko %T An axiomatic approach to joint spectra I %J Studia Mathematica %D 1979 %P 249-261 %V 64 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-64-3-249-261/ %R 10.4064/sm-64-3-249-261 %G en %F 10_4064_sm_64_3_249_261