@article{COCV_2015__21_1_271_0,
     author = {Betz, Thomas and Meyer, Christian},
     title = {Second-order sufficient optimality conditions for optimal control of static elastoplasticity with hardening},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {271--300},
     publisher = {EDP-Sciences},
     volume = {21},
     number = {1},
     year = {2015},
     doi = {10.1051/cocv/2014024},
     zbl = {1311.49017},
     mrnumber = {3348423},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv/2014024/}
}