@article{10_21136_CMJ_1984_101985,
     author = {Patel, A. B. and Vidyanagar, Vallabh},
     title = {Joint essential spectra},
     journal = {Czechoslovak Mathematical Journal},
     pages = {598--603},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1984},
     doi = {10.21136/CMJ.1984.101985},
     mrnumber = {764441},
     zbl = {0571.47001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101985/}
}