Rahmatullaeva Muyassor Baxtiyarovna, and Raxmatullayeva Nargiza Baxtiyarovna. “MURAKKAB GAP TA’RIFI VA UNING NUTQDAGI O‘RNI HAQIDA”. Scientific Impulse, vol. 2, no. 20, May 2024, pp. 137-41, http://nauchniyimpuls.ru/index.php/ni/article/view/15595.