Comments on "Extreme point results for robust stabilization of interval plants with first-order compensators" [with reply]

The commenters identify an extremely minor error in the above-titled paper by B.R. Barmish et al. (ibid., vol.37, no.6, p.707-14, June 1992), i.e. a counterexample which does not satisfy the statement regarding the simplification of the results to the interval plant with denominator degree less than four. In their reply, Barmish et al. agree and point out that if ´less than three´ is substituted for ´less than four´, their statement is completely accurate.<>