Your search returned the following 3 documents:

3. SPASS Version 2.0
   Christoph Weidenbach, Uwe Brahm, Thomas Hillenbrand, Enno Keen, Christian Theobalt, and Dalibor Topić
   In: Automated deduction, CADE-18 : 18th International Conference on Automated Deduction, Kopenhagen, Denmark, 2002, 275-279
   [PS: Download: spass2002.ps]
   
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