@article{MZ_1977__154_172534,
     author = {F. Hofbauer},
     title = {A {Function} with {Countably} {Many} {Ergodic} {Equilibrium} {States.}},
     journal = {Mathematische Zeitschrift},
     pages = {275--282},
     publisher = {mathdoc},
     volume = {154},
     year = {1977},
     zbl = {0336.54043},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__154_172534/}
}