@article{COCV_1999__4__83_0,
     author = {Khapalov, Alexander},
     title = {Approximate controllability and its well-posedness for the semilinear reaction-diffusion equation with internal lumped controls},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {83--98},
     publisher = {EDP-Sciences},
     volume = {4},
     year = {1999},
     mrnumber = {1680760},
     zbl = {0926.93007},
     language = {en},
     url = {http://www.numdam.org/item/COCV_1999__4__83_0/}
}