1. Aijmer, K.: Understanding Pragmatic Markers. A Variational Pragmatic Approach. Edinburgh UP, Edinburgh (2006)
2. Bartkova, K., Bastien, A., Dargnat, M.: How to be a discourse particle? In: Speech Prosody 2016, Boston, USA, pp. 859–863 (2016)
3. Degand, L., Fagard, B.: Alors between discourse and grammar: the role of syntactic position. Funct. Lang. 18, 19–56 (2011)
4. Hansen, M.B.M.: Particles at the Semantics-Pragmatics Interface: Synchronic and Diachronic Issues. Elsevier, Amsterdam (2008)
5. Wichmann, A., Simon-Vandenbergen, A.-A., Aijmer, K.: How prosody reflects semantic change: a synchronic case study of of course. In: Davidse, K., Vandelanotte, L., Cuyckens, H. (eds.) Subjectification, Intersubjectification and Grammaticalization, pp. 103–154. Mouton de Gruyter, Berlin (2010)