Chen, Shuping (ed.) et al., Control of distributed parameter and stochastic systems. Proceedings of the international conference (IFIP WG 7.2), Hangzhou, China, June 19-22, 1998. Boston, MA: Kluwer Academic Publishers. 133-142 (1999).
Pavel, Nicolae H. (ed.), Optimal control of differential equations. A Festschrift in honor of Constantin Corduneanu. New York, NY: Marcel Dekker. Lect. Notes Pure Appl. Math. 160, 271-279 (1994).