TY - JOUR AU - Kunisch, Karl AU - Wachsmuth, Daniel TI - Sufficient optimality conditions and semi-smooth newton methods for optimal control of stationary variational inequalities JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2012 SP - 520 EP - 547 VL - 18 IS - 2 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv/2011105/ DO - 10.1051/cocv/2011105 LA - en ID - COCV_2012__18_2_520_0 ER -