Lyngfelt, Benjamin & Torgrim Solstad (eds.). 2006. Demoting the agent: Passive, middle and other voice phenomena. Linguistik Aktuell/Linguistics today 96. Amsterdam: John Benjamins.
Solstad, Torgrim & Benjamin Lyngfelt. 2006. Perspectives on Demotion. In Benjamin Lyngfelt & Torgrim Solstad (eds.). Demoting the Agent: Passive, middle and other voice phenomena, 1-20. Amsterdam: John Benjamins.