@article{10_4153_CMB_1994_025_1,
     author = {Ding, Ping and Freedman, A. R.},
     title = {Small {Sets} of k-th {Powers}},
     journal = {Canadian mathematical bulletin},
     pages = {168--173},
     year = {1994},
     volume = {37},
     number = {2},
     doi = {10.4153/CMB-1994-025-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-025-1/}
}