A RRT based path planning algorithm for Rehabilitation robots. - Christos Fragkopoulos; Axel Graeser (ISR/ROBOTIK, 2010)

Comparison of sampling based motion planning algorithms specialized for robot manipulators. - Christos Fragkopoulos; Khizar Abbas; Ahmed Eldeep; Axel Graeser (ROBOTIK, 2012)

Book Detection and Grasping in Library Scenario. - Stefan Heyer; Bashar Enjarini; Christos Fragkopoulos; Axel Graeser (ROBOTIK, 2012)

Vision-based Control of Assistive Robot FRIEND: Practical Experiences and Design Conclusions. - Axel Gräser; Olena Kuzmicheva; Danijela Ristic-Durrant; Saravana K. Natarajan; Christos Fragkopoulos (Autom., 2012)

A BCI-controlled robotic assistant for quadriplegic people in domestic and professional life. - Sorin Mihai Grigorescu; Thorsten Lüth; Christos Fragkopoulos; Marco Cyriacks; Axel Gräser (Robotica, 2012)

A Supportive FRIEND at Work: Robotic Workplace Assistance for the Disabled. - Axel Gräser; Torsten Heyer; Leila Fotoohi; Uwe Lange; Henning Kampe; Bashar Enjarini; Stefan Heyer; Christos Fragkopoulos; Danijela Ristic-Durrant (IEEE Robotics Autom. Mag., 2013)