Evolution of Robotic Simulators: Using UE 4 to Enable Real-World Quality Testing of Complex Autonomous Robots in Unstructured Environments. - Patrick Wolf; Tobias Groll; Steffen Hemer; Karsten Berns (SIMULTECH, 2020)

A Hierarchical Approach for Autonomous Planning and Execution of Excavation Tasks. - Tobias Groll (Dr. Hut, 2022)