@article{10_4064_sm_43_2_139_156,
     author = {Anthony To-Ming Lau},
     title = {Action of topological semigroups, invariant means, and fixed points},
     journal = {Studia Mathematica},
     pages = {139--156},
     publisher = {mathdoc},
     volume = {43},
     number = {2},
     year = {1972},
     doi = {10.4064/sm-43-2-139-156},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-43-2-139-156/}
}