Ellipse fitting and parameter assessment of circular object targets for robot vision. - Sung Joon Ahn; Wolfgang Rauh; Matthias Recknagel (IROS, 1999)

Circular coded landmark for optical 3D-measurement and robot vision. - Sung Joon Ahn; Wolfgang Rauh; Matthias Recknagel (IROS, 1999)

Least Squares Orthogonal Distance Fitting of Implicit Curves and Surfaces. - Sung Joon Ahn; Wolfgang Rauh; Matthias Recknagel (DAGM-Symposium, 2001)

Improving the Exchange of Requirements and Specifications between Business Partners. - Manuel Reis Monteiro; Christof Ebert; Matthias Recknagel (RE, 2009)