@INPROCEEDINGS{94cdc-univ, AUTHOR = {E.D. Sontag and Y. Wang}, BOOKTITLE = {Proc. IEEE Conf. Decision and Control, Orlando, Dec. 1994, IEEE Publications, 1994}, TITLE = {Orders of I/O equations and uniformly universal inputs}, YEAR = {1994}, OPTADDRESS = {}, OPTCROSSREF = {}, OPTEDITOR = {}, OPTMONTH = {}, OPTNOTE = {}, OPTNUMBER = {}, OPTORGANIZATION = {}, PAGES = {1270--1275}, OPTPUBLISHER = {}, OPTSERIES = {}, OPTVOLUME = {}, KEYWORDS = {identifiability, observability, realization theory} }