Dr. Ali Fadlalla Ahmad AL Basheer, and Dr. Hassan Mohammed Abdelaal AL Moukashfi. “The Challenges That Face University Students in Using Definite and Indefinite Articles in English Language: A Case Study of Kosti Locality, White Nile State”. White Nile Journal for Studies and Research, no. 26, Sept. 2025, pp. 166-80, https://journals.wnu.edu.sd/index.php/wnjsr/article/view/13.