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ALI BOUTOULOUT, and HAMID BOURRAY, and FATIMA-ZAHRAE EL ALAOUI, and LAYLA EZZAHRI, (2014) Constrained Controllability for Distributed Hyperbolic Systems. Math. Sci. Lett. 3, No. 3, 207-214 (2014).

ALI BOUTOULOUT, and LAYLA EZZAHRI, and HAMID BOURRAY, (2014) A new approach to the constrained controllability problem. APPLICATIONES MATHEMATICAE 41,2-3 (2014), pp. 221-228.