@article{10_4064_sm146_3_5,
     author = {Naoki Tanaka},
     title = {A characterization of evolution operators},
     journal = {Studia Mathematica},
     pages = {285--299},
     publisher = {mathdoc},
     volume = {146},
     number = {3},
     year = {2001},
     doi = {10.4064/sm146-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm146-3-5/}
}