@article{10_21136_CMJ_1961_100484,
     author = {Mandl, Petr},
     title = {Spectral theory of semi-groups connected with diffusion processes and its application},
     journal = {Czechoslovak Mathematical Journal},
     pages = {558--569},
     year = {1961},
     volume = {11},
     number = {4},
     doi = {10.21136/CMJ.1961.100484},
     mrnumber = {0137143},
     zbl = {0115.13503},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100484/}
}