Your search returned the following 2 documents:

2. SPASS V0.77
   Christoph Weidenbach, Christoph Meyer, Christian Cohrs, Thorsten Engel, and Enno Keen
   Journal of Automated Reasoning 21 (1): 113-113, 1998
   
1. System Description: SPASS Version 1.0.0
   Christoph Weidenbach, Bijan Afshordel, Uwe Brahm, Christian Cohrs, Thorsten Engel, Enno Keen, Christian Theobalt, and Dalibor Topić
   In: Proceedings of the 16th International Conference on Automated Deduction (CADE-16), Trento, Italy, 1999, 314-318