%0 Journal Article %A Flores-Flores, Juan Pablo %A Martinez-Guerra, Rafael %T PI observer design for a class of nondifferentially flat systems %J International Journal of Applied Mathematics and Computer Science %D 2019 %P 655-665 %V 29 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2019_29_4_a2/ %G en %F IJAMCS_2019_29_4_a2