@article{CMUC_1977__18_2_a0,
     author = {Gwinner, Joachim},
     title = {Mean value theorem for convex functionals},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {213--218},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1977},
     mrnumber = {0442167},
     zbl = {0352.26007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_2_a0/}
}