@article{IJAMCS_1999_9_4_a1,
     author = {Zerrik, E. and Boutoulout, A. and Kamal, A.},
     title = {Regional {Gradient} {Controllability} of {Parabolic} {Systems}},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {767--787},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_1999_9_4_a1/}
}