@article{CMUC_1977__18_2_a16,
     author = {Dane\v{s}, Josef},
     title = {On the strict convexity of the polar operator},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {393--400},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1977},
     mrnumber = {0442628},
     zbl = {0356.46002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_2_a16/}
}