ALI BOUTOULOUT, and HAMID BOURRAY, and FATIMA-ZAHRAE EL ALAOUI, (2015) Regional Boundary Observability of Semilinear Hyperbolic Systems : HUM Approach. Appl. Math. Inf. Sci. Lett. 3, No. 1, 1-6 (2015).

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 HAMID BOURRAY, and ADIL KHAZARI, (2014) Flux Observability for Hyperbolic Systems. Appl. Math. Inf. Sci. Lett. 2, No. 1, 13-24 (2014).

HAMID BOURRAY, and ALI BOUTOULOUT, and IMAD EL HARRAKI, (2014) Gradient Controllability for Hyperbolic Systems. Inf. Sci. Lett. 3, No. 1, 11-19 (2014).

ALI BOUTOULOUT, and HAMID BOURRAY, and FATIMA-ZAHRAE EL ALAOUI, (2014) Regional boundary observability of semilinear hyperbolic systems: sectorial approach. IMA Journal of Mathematical Control and Information (2014) Page 1 of 17..

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.

HAMID BOURRAY, and ALI BOUTOULOUT, and MOHAMED BADDI, (2012) Regional boundary observability with constraints of the gradient. Intelligent Control and Automation, 2012, Vol. 3 Issue 4, pp. 319-328..

EL H. ZERRIK, and HAMID BOURRAY, and S. BENHADID, (2010) Sensors And Boundary State Reconstruction of Hyperbolic Systems. Int.J.Appt.Math. Comput. Sci .Vol.20, N°.2, PP. 227-238, 2010.