1. Tense and temporal ordering in English and Dutch indirect speech;Boogaart,1996
2. The Comment Clause in English: Syntactic Origins and Pragmatic Development;Brinton,2008
3. Tense in indirect speech;Comrie;Folia Linguistica,1986
4. Reported speech: some general issues;Coulmas,1986
5. Tense in English: Its Structure and Use in Discourse;Declerck,1991