%0 Journal Article %A Salas, Oscar %A Castañeda, Herman %A De León-Morales, Jesús %T Attitude observer-based robust control for a twin rotor system %J Kybernetika %D 2013 %P 809-828 %V 49 %N 5 %U http://geodesic.mathdoc.fr/item/KYB_2013_49_5_a9/ %G en %F KYB_2013_49_5_a9