@article{AIF_2006__56_4_839_0,
     author = {Frantzikinakis, Nikos and Lesigne, Emmanuel and Wierdl, M\'at\'e},
     title = {Sets of $k$-recurrence but not $(k+1)$-recurrence},
     journal = {Annales de l'Institut Fourier},
     pages = {839--849},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {56},
     number = {4},
     year = {2006},
     doi = {10.5802/aif.2202},
     zbl = {1123.37001},
     mrnumber = {2266880},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2202/}
}