3[3]T.Ita "Methods of Estimation for Multi - Market Disequilibrium Models""Economitrica"vol 148, p97 - 125, 1980.
4[1]Davison E J. The Robust Control of a Servomechanism Problem for Liner Invariant Multivariable Systems[J].IEEE Trans Auto Control, 1996,25(3):25~34.
5[2]Chen, M.J and C.A deseor. Necessary and sufficient condition for Robust stability of liner distributed feedback systems[J]. Int. J.Control, 1982,35(2):255~267.