@article{10_4153_CJM_1979_109_9,
     author = {Gardner, L. Terrell},
     title = {An {Inequality} {Characterizes} the {Trace}},
     journal = {Canadian journal of mathematics},
     pages = {1322--1328},
     year = {1979},
     volume = {31},
     number = {6},
     doi = {10.4153/CJM-1979-109-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-109-9/}
}