@article{10_4064_sm_81_3_287_291,
     author = {Klaus Thomsen},
     title = {Invariant states for positive operator semigroups},
     journal = {Studia Mathematica},
     pages = {287--291},
     publisher = {mathdoc},
     volume = {81},
     number = {3},
     year = {1985},
     doi = {10.4064/sm-81-3-287-291},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-81-3-287-291/}
}