Media type: E-Article Title: On a Question of H. Friedman Contributor: Plotkin, Gordon Published: Elsevier BV, 1996 Published in: Information and Computation, 126 (1996) 1, Seite 74-77 Language: English DOI: 10.1006/inco.1996.0035 ISSN: 0890-5401 Keywords: Computational Theory and Mathematics ; Computer Science Applications ; Information Systems ; Theoretical Computer Science Origination: Footnote: Access State: Open Access