%0 Journal Article %A Ebenbeck, Matthias %A Knopf, Patrik %T Optimal control theory and advanced optimality conditions for a diffuse interface model of tumor growth %J ESAIM: Control, Optimisation and Calculus of Variations %D 2020 %V 26 %I EDP-Sciences %U http://archive.numdam.org/articles/10.1051/cocv/2019059/ %R 10.1051/cocv/2019059 %G en %F COCV_2020__26_1_A71_0