Stanley Peters, "Speaker commitments: Presupposition", Proceedings of the Semantics and Linguistic Theory Conference (SALT) 26: 1083–1098, 2016, ((download PDF))
sil.org
Loos, Eugene E.; Anderson, Susan; Day, Dwight H. Jr.; Jordan, Paul C.; Wingate, J. Douglas (eds.). "What is an alternative question?". Glossary of linguistic terms. SIL International.