Sarsembayeva, A., M. Odsuren, F. Belisarova, A. Sarsembay, and S. A. L. Maftunzada. “Detecting the Sun’s Active Region Using Image Processing Techniques”. Physical Sciences and Technology, vol. 8, no. 3-4, Dec. 2021, pp. 48-53, doi:10.26577/phst.2021.v8.i2.07.