1. Astruc, L., M.M. Vanrell, and P. Prieto. 2016. Cost of the Action and Social Distance Affect the Selection of Question Intonation in Catalan. In Interdisciplinary Approaches to Intonational Grammar in Ibero-Romance, ed. M.E. Armstrong, N. Henriksen, and M.M. Vanrell. Amsterdam: John Benjamins. in press.
2. Blum-Kulka, S., J. House, and G. Kasper. 1989. Investigating Cross-Cultural Pragmatics: An Introductory Overview. In Cross-Cultural Pragmatics: Requests and Apologies, ed. S. Blum-Kulka, J. House, and G. Kasper, 1–34. Norwood: Ablex.
3. Boersma, P., and D. Weenink. 2016. Praat: Doing Phonetics by Computer (Version 6.0.10) [Computer Program]. Retrieved January 12, 2016, from http://www.praat.org/
4. Borràs-Comes, J., R. Sichel-Bazin, and P. Prieto. 2015. Vocative Intonation Preferences Are Sensitive to Politeness Factors. Language and Speech 58 (1): 68–83.
5. Brown, P., and S.C. Levinson. 1987. Politeness: Some Universals in Language Usage. Cambridge: Cambridge University Press.