1. Young, P.C.: Leondes, C.T., Recursive estimation, forecasting and adaptive control, (Academic Press, San Diego 1989),30, p. 119–166 Pt. 3
2. Boucher, A.R., Cox, C.S., and Young, P.C.: True digital control an integrated environment for the design of direct digital and adaptive control systems, 1988), p. 93–98IEE Conf Publi. 285
3. ‘An instrumental variable approach to model reduction’, Technical report, TR81, Centre for Research on Environmental Systems, 1989