%0 Journal Article %A Khapalov, A. Y. %T Approximate Controllability Properties of the Semilinear Heat Equation With Lumped Controls %J International Journal of Applied Mathematics and Computer Science %D 1999 %P 751-765 %V 9 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_1999_9_4_a0/ %G en %F IJAMCS_1999_9_4_a0