%0 Journal Article %A Miyachi, Akihiko %T Hardy Space Estimate for the Product of Singular Integrals %J Canadian journal of mathematics %D 2000 %P 381-411 %V 52 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-018-2/ %R 10.4153/CJM-2000-018-2 %F 10_4153_CJM_2000_018_2