@article{CMUC_1975_16_4_a3,
     author = {Ho Duc Viet},
     title = {Remarks on subdifferentials of convex functionals},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {641--661},
     year = {1975},
     volume = {16},
     number = {4},
     mrnumber = {0390765},
     zbl = {0322.46050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1975_16_4_a3/}
}