@article{10_4153_CJM_2010_038_x,
     author = {Xia, Jingbo},
     title = {Singular {Integral} {Operators} and {Essential} {Commutativity} on the {Sphere}},
     journal = {Canadian journal of mathematics},
     pages = {889--913},
     year = {2010},
     volume = {62},
     number = {4},
     doi = {10.4153/CJM-2010-038-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2010-038-x/}
}