Irbutaeva Nigora Dilshodovna, Irbutaeva Parvinа Yusufzoda, and Turakulov Elbek Muradullaevich. “THE IDEA OF ‘COGNITIVE ACTIVITY’: RETROSPECTIVE ANALYSIS”. Journal of New Century Innovations, vol. 51, no. 2, Apr. 2024, pp. 94-97, https://newjournal.org/new/article/view/13013.