on
  method [3,4].

</PRE>
<A name="References"><B><FONT SIZE="+1">References</FONT></B></A>
<PRE>
  [1] Varga A. and Fasol K.H.
      A new square-root balancing-free stochastic truncation model
      reduction algorithm.
      Proc. 12th IFAC World Congress, Sydney, 1993.

  [2] Safonov M. G. and Chiang R. Y.
      Model reduction for robust control: a Schur relative error
      method.
      Int. J. Adapt. Contr. Sign. Proc., vol. 2, pp. 259-272, 1988.

  [3] Green M. and Anderson B. D. O.
      Generali