| title | ISBN-13 | year of publication |
|---|---|---|
| Analytical Commentary on the "Philosophical Investigations": Wittgenstein: Rules, Grammars and Necessity v. 2 | 978-0-631-13024-6 | 1985 |
| An analytical commentary on the 'Philosophical investigations' | 978-0-631-12111-4 | 1980 |
| Language, Sense and Nonsense | 978-0-631-13519-7 | 1984 |
| Scepticism, Rules and Language | 978-0-631-13614-9 | 1984 |