@article{10_4153_CJM_1968_063_9,
     author = {Brooks, R. M.},
     title = {On the {Invariance} of the {Spectrum} in {Locally} {m-Convex} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {658--664},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-063-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-063-9/}
}