@misc{10_4153_CMB_1988_051_9,
     title = {The {Proximal} {Subgradient} {Formula} in {Banach} {Space}},
     journal = {Canadian mathematical bulletin},
     pages = {353--361},
     year = {1988},
     volume = {31},
     number = {3},
     doi = {10.4153/CMB-1988-051-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-051-9/}
}