@article{10_4153_CJM_1975_040_2,
     author = {Chong, Kong-Ming},
     title = {Variation {Reducing} {Properties} of {Decreasing} {Rearrangements}},
     journal = {Canadian journal of mathematics},
     pages = {330--336},
     year = {1975},
     volume = {27},
     number = {2},
     doi = {10.4153/CJM-1975-040-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-040-2/}
}