%0 Journal Article %A Mandl, Petr %T Spectral theory of semi-groups connected with diffusion processes and its application %J Czechoslovak Mathematical Journal %D 1961 %P 558-569 %V 11 %N 4 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100484/ %R 10.21136/CMJ.1961.100484 %G en %F 10_21136_CMJ_1961_100484