1. Aikhenvald, A.Y.: Evidentiality. Oxford University Press, Oxford (2004)
2. Bhat, D.N.S.: Pronouns. Oxford University Press, Oxford (2004)
3. Blake, B.J.: Case. Cambridge University Press, Cambridge (2001)
4. Bliss, H., Ritter, E.: Developing a database of personal and demonstrative pronoun paradigms: Conceptual and technical challenges. In: Proceedings of the IRCS Workshop on Linguistic Databases. IRCS, Philadelphia (2001)
5. Brown, P., Levinson, S.C.: Politeness: Some Universals in Language Usage. Cambridge University Press, Cambridge (1987)