@article{MAN_1979__240_163230,
     author = {J.-A. Chao},
     title = {Conjugate {Characterizations} of {H1} {Dyadic} {Martingales.}},
     journal = {Mathematische Annalen},
     pages = {63--68},
     publisher = {mathdoc},
     volume = {240},
     year = {1979},
     zbl = {0403.42016},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__240_163230/}
}