@article{MZ_1982__181_173253,
     author = {Edward Brian Davies},
     title = {The {Harmonic} {Functions} of {Mean} {Ergodic} {Markov} {Semigroups.}},
     journal = {Mathematische Zeitschrift},
     pages = {543--552},
     publisher = {mathdoc},
     volume = {181},
     year = {1982},
     zbl = {0493.60078},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__181_173253/}
}