@article{10_4064_sm192_3_3,
     author = {Rocco Duvenhage},
     title = {Bergelson's theorem for weakly mixing
 $C^*$-dynamical systems},
     journal = {Studia Mathematica},
     pages = {235--257},
     year = {2009},
     volume = {192},
     number = {3},
     doi = {10.4064/sm192-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm192-3-3/}
}