TY - JOUR AU - Andrzej Sołtysiak TI - On joint spectra of operators on a Banach space isomorphic to its square JO - Colloquium Mathematicum PY - 1989 SP - 331 EP - 337 VL - 57 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-57-2-331-337/ DO - 10.4064/cm-57-2-331-337 LA - en ID - 10_4064_cm_57_2_331_337 ER -