%0 Journal Article %A Jardine, J. F. %T Stable Components and Layers %J Canadian mathematical bulletin %D 2020 %P 562-576 %V 63 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/S000843951900064X/ %R 10.4153/S000843951900064X %F 10_4153_S000843951900064X