@article{10_4153_CMB_1999_038_7,
     author = {Kikuchi, Masato},
     title = {Averaging {Operators} and {Martingale} {Inequalities} in {Rearrangement} {Invariant} {Function} {Spaces}},
     journal = {Canadian mathematical bulletin},
     pages = {321--334},
     year = {1999},
     volume = {42},
     number = {3},
     doi = {10.4153/CMB-1999-038-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1999-038-7/}
}