Short Courses on Modern Control Theory I & II, MIT, July 1976.
 

Symposium on Simulation (GPSS) , Southern Simulation Inc, Tampa, Florida, July 1977.
 

 Twentieth Midwest Symposium on Circuits and Systems, Texas Tech University, Lubbock, Texas, USA, August 15-17, 1977.
 

Second International Symposium on The Operator Theory of Networks and Systems, Texas Tech University, Lubbock, Texas, USA,  August 18-19, 1977.
 

 Pedagogy Seminar: INELEC Faculty Development, offered by the Center for International Programs and Studies, University of Missouri-Rolla, sponsored by the Algerian Government in cooperation with the Education Development Center of Boston, Univ. of Missouri-Rolla, May 19-25, 1977.
 

Differential and integral equations, Seventh Midwest Conference held at the University of Missouri, Rolla, Mo., November 3-4, 1978.
 

Fifth I.M.A. International Conference on Control Theory, University of Strathclyde, Glasgow, UK, September 1988:
Title of the talk: On frequency response for nonlinear  systems.

 University of Sheffield:
Title of the talk: Input-Output maps for Nonlinear Systems, 1990.
 

University of Sheffield, Workshop on Flat Systems, 1990:
Title of the talk: Optimal Control of Nonlinear Systems, 1996.
 

 International Conference on Differential Equations and Dynamical Systems, University of Waterloo, Canada, August 1-4, 1997:
Title of the talk: Eigenvalue  Problems: A Control Theoretic Approach.
 

 IMACS 2000, University of Wisconsin, Milwaukee, May 25-27, 2000:
Title of the talk: On a class of random Sturm-Liouville problems
Title of the talk:  High Order Approximations of the Eigenvalues of Sturm-Liouville Problems with Coupled Self-Adjoint Boundary Conditions.