%0 Journal Article %A Zbigniew Słodkowski %T An infinite family of joint spectra %J Studia Mathematica %D 1977 %P 239-255 %V 61 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-61-3-239-255/ %R 10.4064/sm-61-3-239-255 %G en %F 10_4064_sm_61_3_239_255