A new solution property in optimal control: The lens. - Gustav Feichtinger; Richard F. Hartl; Peter M. Kort; Yuri A. Yegorov (Autom., 2007)

Growth and Collapse of Empires: A Dynamic Optimization Model. - Yuri A. Yegorov; Dieter Grass; Magda Mirescu; Gustav Feichtinger; Franz Wirl (J. Optim. Theory Appl., 2020)