TY - JOUR AU - El Jai, A. AU - Hamzaoui, H. TI - Regional observation and sensors JO - International Journal of Applied Mathematics and Computer Science PY - 2009 SP - 5 EP - 14 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IJAMCS_2009_19_1_a0/ LA - en ID - IJAMCS_2009_19_1_a0 ER -