%0 Journal Article %A Lu, Zuliang %T New a posteriori $L^{\infty }(L^2) $ and $L^2(L^2)$-error estimates of mixed finite element methods for general nonlinear parabolic optimal control problems %J Applications of Mathematics %D 2016 %P 135-163 %V 61 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/s10492-016-0126-x/ %R 10.1007/s10492-016-0126-x %G en %F 10_1007_s10492_016_0126_x