%0 Journal Article %A Steele, J. Michael %T Covering Finite Sets by Ergodic Images %J Canadian mathematical bulletin %D 1978 %P 85-91 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-013-3/ %R 10.4153/CMB-1978-013-3 %F 10_4153_CMB_1978_013_3