Abstract :
For original paper by Chu see ibid., vol.AC-18, no.10, p.499-505 (1973): "Estimation and decision for linear systems with elliptical random processes". The author found an author\´s reply by Chu (see ibid., vol.47, no.1, p.200, 2002) to the author\´s comments (Hodishima, see ibid., vol.47, no.1, p.200, 2002) on his 1973 IEEE paper. However, the author found an error in his reply.