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 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..

A. BOUTOULOUT, and H. BOURRAY, and FATIMA-ZAHRAE EL ALAOUI, (2013) Boundary gradient observability for semilinear parabolic systems: Sectorial approach. Mathematical Sciences Letters, International Journal, 2, No. 1,pp 45-53., 2013.

H. BOURRAY, and A. BOUTOULOUT, and M. BADDI, and FATIMA-ZAHRAE EL ALAOUI, (2011) Regional boundary observability with constraints. Int. Review of automatic control V4 N°6 (2011), PP. 846-854..

A. BOUTOULOUT, and H. BOURRAY, and FATIMA-ZAHRAE EL ALAOUI, (2010) Regional Boundary Observability of Semi –Linear Systems Approach and simulation. Int.Journal of Maths.Analysis,Vol ; 4, N°.24, 1153 – 1173, 2010.