@article{CRMATH_2002__335_11_895_0,
     author = {Costakis, George and Peris, Alfredo},
     title = {Hypercyclic semigroups and somewhere dense orbits},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {895--898},
     publisher = {Elsevier},
     volume = {335},
     number = {11},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02572-4},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02572-4/}
}