Model reduction methods for chaotic systems. - Tom T. Hartley; Helen Qammar; Larry D. Murphy (Kybernetika, 1993)

Manifolds and control of chaotic systems. - Helen Qammar; Arun Venkatesan (Comput. Graph., 1995)

Fractal basins in the control of the logistic equation. - Helen Qammar; Faramarz Mossayebi (Comput. Graph., 1996)