%0 Journal Article %A Day, Alan %T Doubling Constructions in Lattice Theory %J Canadian journal of mathematics %D 1992 %P 252-269 %V 44 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-017-7/ %R 10.4153/CJM-1992-017-7 %F 10_4153_CJM_1992_017_7