Xayrullayeva, Charosxon Sayfullo kizi, and Raykhona Rustamjonovna Gulomova. “A Corpus-Based Analysis of Lexical Diversity (TTR) in Fourth-Year Uzbek EFL students’ Essays”. The Lingua Spectrum, vol. 3, no. 1, Apr. 2026, pp. 483-7, https://lingvospektr.uz/index.php/lngsp/article/view/1609.