%0 Journal Article %A Kunisch, Karl %A Wachsmuth, Daniel %T On time optimal control of the wave equation, its regularization and optimality system %J ESAIM: Control, Optimisation and Calculus of Variations %D 2013 %P 317-336 %V 19 %N 2 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/cocv/2012010/ %R 10.1051/cocv/2012010 %G en %F COCV_2013__19_2_317_0