Application of an Optimistic Concurrency Control Method. - Martin L. Kersten; Hans Tebra (Softw. Pract. Exp., 1984)

Prolog for programmers : by F. Kluzniak and S. Szpakowicz (Academic Press, 400 pages, $47.50, 1985). - Hans Tebra (Future Gener. Comput. Syst., 1986)

Optimistic And-Parallelism in Prolog. - Hans Tebra (PARLE (2), 1987)