%0 Journal Article %A Švec, Alois %T Spectrum of 2-dimensional manifolds %J Czechoslovak Mathematical Journal %D 1988 %P 237-244 %V 38 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102218/ %R 10.21136/CMJ.1988.102218 %G en %F 10_21136_CMJ_1988_102218