%0 Journal Article %A Brendle, Jörg %T Dow’s Principle and Q-Sets %J Canadian mathematical bulletin %D 1999 %P 13-24 %V 42 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1999-002-2/ %R 10.4153/CMB-1999-002-2 %F 10_4153_CMB_1999_002_2