1. Evidentiality;Aikhenvald,2004
2. A psychological account of the development and use of evidentials in Turkish;Aksu,1986
3. Epistemic marking in Ika (Arwako);Bergqvist;Stud. Lang.,2012
4. The role of sentence type in Ika (Arwako) egophoric marking;Bergqvist,2018
5. Person and evidence in Himalayan languages;Bickel;Linguist. Tibeto-Burman Area,2000