%0 Journal Article
%A Walter Ferrer Santos
%T A short survey on observability
%J Revista colombiana de matematicas
%D 2019
%P 143-183
%V 53
%N E
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RCM_2019_53_E_a4/
%F RCM_2019_53_E_a4