@article{10_4153_CJM_2000_042_8,
     author = {Mankiewicz, Piotr},
     title = {Compact {Groups} of {Operators} on {Subproportional} {Quotients} of l 1 m},
     journal = {Canadian journal of mathematics},
     pages = {999--1017},
     year = {2000},
     volume = {52},
     number = {5},
     doi = {10.4153/CJM-2000-042-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-042-8/}
}