Baras, John S., Bensoussan, Alain., James, Matthew R., "Dynamic Observers as Asymptotic Limits of Recursive Filters: Special Cases", SIAM Jounal on Applied Mathematics, Vol. 48, No. 5, pp. 1147-1158, Phoenix, Arizona, October 1988
Baras, John S., Bensoussan, Alain., James, M R., "Dynamic Observers as Asymptotic Limits of Recursive Filters: Special Cases", The 1987 International Symposium on Mathematical Theory of Networks and Systems, pp. 1-31, Phoenix, Arizona, June 15-19, 1987
