Akbia, L. (2012). A Study of Discourse Markers in Editorials of Selected Persian and English Newspapers Based on Fraser's Approach. Master's Thesis. Ferdowsi University of Mashhad.
Alami, M & Sabah, M. (2012). Gender and discourse differences: A study of discourse markers in daily conversations of Persian-speaking men and women., Persian Language and Literature, Vol. 4, No. 10, pp. 1-22.
Behbahanizadeh, H. (2010). A study of certain discourse markers in the Holy Quran. Master's thesis, Allameh Tabataba'i University.
Blakemore, D. (1987). Semantic constraints on relevance. Oxford: Blackwell.
Bloor, M and Bloor, T. (2007). The Practice of Critical Discourse Analysis. Routledge. Taylor & Francis Group.
Chilton, P. (2004). Analysing Political Discourse: Theory and Practice. Abingdon-on-Thames: Routledge.
Corcoran, Simon (2000), The Empire of the Tetrarchs, Imperial Pronouncements and Government AD 284–324 (2nd ed.), Oxford University Press.
Fraser, B. (1999). What are discourse markers? Journal of Pragmatics. 31: 931-952.
Fraser, B. (2006). Towards a theory of discourse markers. In F. Kerstin (Ed.), Approaches to discourse particles. Elsevier, pp. 189-204.
Fraser, B. (2009). Hedging in political discourse. In papers from the 2d International conference on PD Warsaw. Poland (edited by piotrcap). pp: 201-212.
Gruber, H. (1987). Political Language and Textual Vagueness', paper presented at the International Pragmatics Association, Antwerp.
Ghiathian, M. S., Ahangar, A., Firahi, D., & Zakari, T. (2015). Mitigating discourse markers in the press conferences of the tenth Iranian president., Linguistic Studies, Vol. 6, No. 3 (Issue 24), pp. 216-239.
Galedari, M. (2008). A study of spoken Persian discourse markers and their role in comprehension for non-Iranian Persian learners. Master's thesis, Shahid Beheshti University.
Halliday, M. A. K. and Hasan, R. (1989). Spoken and written language. Oxford: Oxford University Press.
Jucker, A. and Ziv, Y. (1998). Discourse markers: Descriptions and theory. Amsterdam, Netherlands: John Benjamins.
Moghaddamkia, (2005). The dimension of discourse markers in Persian., Academy Letter, No. 3, pp. 81-98.
Momeni, N. (2006). Discourse markers in Persian and English., Pazand Quarterly, Vol. 2, No. 5, pp. 51-79.
Nadernejad, G. (2010). The study of discourse markers in Persian and their role in improving the writing skills of non-Persian speakers. Bachelor's thesis, Ferdowsi University of Mashhad.
Redeker, G. (1991). Linguistic marker of discourse structure. Linguistics. 29: 1139-1172.
Schiffrin, D. (1987). Discourse markers. Cambridge: Cambridge University Press.
Siepmann, D. (2004). Discourse Markers across Languages. A contrastive study of second-level discourse markers in native and non-native text with implications for general and pedagogic lexicography. New York: Routledge.
Van Dijk, T.A. (1997). Discourse in the language classroom studies: An interdisciplinary approach (vol.2). Beverly Hills: Sage.
Zare, J. (2018). Reference in importance-marking discourse markers in academic lectures, Linguistic Research, Vol. 10, No. 29, pp. 179-192.
Zare, J. (2019). Classification and analysis of importance-marking discourse markers based on their communicative role and positional use in Persian academic presentations, Linguistic Research, Vol. 11, No. 32, pp. 231-252.
Zoghdaarmoghadam, R., & Dabirmoghadam, M. (2002). Comparing the discourse marker, but, in English with, ama, in Persian.,Foreign Language Studies, No. 12, pp. 55-76.