@article{MZ_1996__223_3_174910,
     author = {J.P. Gathier and I.A.K. Kupka},
     title = {Oberservability for systems with more outputs than inputs and asymptotic oberservers.},
     journal = {Mathematische Zeitschrift},
     pages = {47--78},
     publisher = {mathdoc},
     volume = {223},
     number = {3},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MZ_1996__223_3_174910/}
}