@article{10_37236_6678,
     author = {Lara Pudwell and Eric Rowland},
     title = {Avoiding fractional powers over the natural numbers},
     journal = {The electronic journal of combinatorics},
     year = {2018},
     volume = {25},
     number = {2},
     doi = {10.37236/6678},
     zbl = {1402.68150},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/6678/}
}