@misc{li_tests_with_1991, 
author={Li, F. Q., Niemann, H.-R., Aust, E.},
title={Tests with TITAN 7F manipulator},
year={1991},
howpublished = {GKSS report},
note = {Li, F.; Niemann, H.; Aust, E.: Tests with TITAN 7F manipulator. GKSS 91-E-87. 1991.}}