An Annual Conference of the Society for Mathematical Biology Joint with Japan Association for Mathematical Biology, 16-19 July 2001, Hilo, Hawaii
Sixth SIAM Conference on Applications of Dynamical Systems, 20-24 May 2001, Snowbird Ski and Summer Resort, Snowbird, Utah
Joint Conference of the American Mathematical Society and the Mathematical Association of America, 10-13 January, 2001, New Orleans, Louisiana
“An optimal control problem in population dynamics”, Mathematical Biology Seminar, Arizona State University, spring 1998
“Complex numbers and some of their applications”, First Annual Conference of Cameroonian Mathematicians Union in the Soviet Union, July 8-10, 1990, Ivanova, Russian Federation, USSR
“Parabolic boundary value problems in an infinite band”, Second Annual Conference of Cameroonian Mathematicians Union Joint with Cameroonian Physicists in the Soviet Union, May 8-10, 1991, Kharkov, Ukraine, USSR
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