Oroji, Mohammadreza, and Shidak Rahbarian. “Introducing Form-Function Theory Evidence from the Post Position “ra” and Focus Marker ‘ke’ in Persian”. Global Journal of Sociology: Current Issues 5, no. 2 (December 31, 2015): 54–58. Accessed April 28, 2024. https://un-pub.eu/ojs/index.php/gjs/article/view/176.