%0 Journal Article %A Priestley, H.A. %A Santos, R. %T Varieties of distributive lattices with unary operations. II. %J Portugaliae mathematica %D 1998 %P 135-166 %V 55 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1998__55_2_48125/ %G en %F PORMA_1998__55_2_48125