@article{10_4064_sm_64_3_249_261,
     author = {W. \.Zelazko},
     title = {An axiomatic approach to joint spectra {I}},
     journal = {Studia Mathematica},
     pages = {249--261},
     publisher = {mathdoc},
     volume = {64},
     number = {3},
     year = {1979},
     doi = {10.4064/sm-64-3-249-261},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-64-3-249-261/}
}