1. A short proof of two recently discovered independence results using recursion theoretic methods;Cichon,1983
2. An ordinal calculus for proving termination in term rewriting;Cichon,1996
3. Well partial orderings and hierarchies;De Jongh,1977
4. Subrecursive hierarchies via direct limits;Dennis-Jones,1984
5. Ordinal Complexity of Recursive Definitions;Fairtlough;Inform. and Comput.,1992