@article{10_4064_cm_57_2_331_337,
     author = {Andrzej So{\l}tysiak},
     title = {On joint spectra of operators on a {Banach} space isomorphic to its square},
     journal = {Colloquium Mathematicum},
     pages = {331--337},
     publisher = {mathdoc},
     volume = {57},
     number = {2},
     year = {1989},
     doi = {10.4064/cm-57-2-331-337},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-57-2-331-337/}
}