Direct computation of optimal PID controllers. - Gísli Herjólfsson; Anna Soffía Hauksdóttir (CDC, 2003)

Direct computation of optimal discrete-time PID controllers. - Gísli Herjólfsson; Anna Soffía Hauksdóttir (ACC, 2004)

Zero optimized tracking for linear continuous-time systems. - Gísli Herjólfsson; Bergþór Ævarsson; Anna Soffía Hauksdóttir; Sven P. Sigurosson (ACC, 2005)

Zero Optimizing Tracking and Disturbance Rejecting Controllers - The extended PID controller. - Anna Soffía Hauksdóttir; Gísli Herjólfsson; Sven Þ. Sigurðsson (CDC, 2006)

Scheduled Control of a Small Unmanned Underwater Vehicle Using Zero Optimization. - Helgi Porgilsson; Gísli Herjólfsson; Anna Soffía Hauksdóttir; Sven Þ. Sigurðsson (CDC, 2006)

Optimized Zero Tracking and Disturbance Rejecting Controllers - The Generalized PID Controller. - Anna Soffía Hauksdóttir; Gísli Herjólfsson; Sven Þ. Sigurðsson (ACC, 2007)

Closed form expressions for linear MIMO system responses and solutions of the Lyapunov equation. - Anna Soffía Hauksdóttir; Sven Þ. Sigurðsson; Sigurður Örn Aðalgeirsson; Gísli Herjólfsson (CDC, 2007)

Closed form solutions of the Sylvester and the Lyapunov equations - closed form Gramians. - Anna Soffía Hauksdóttir; Sven Þ. Sigurðsson; Sigurður Örn Aðalgeirsson; Helgi Porgilsson; Gísli Herjólfsson (ACC, 2008)

Closed form ℒ2/ℋ2-optimising of zeros for model reduction of linear continuous time systems. - Gísli Herjólfsson; Bergþór Ævarsson; Anna Soffía Hauksdóttir; Sven Þ. Sigurðsson (Int. J. Control, 2009)