Ashirbayev, N., Zh. Ashirbayeva, T. Sultanbek, and M. Shomanbayeva. “Waves of Elastic Stresses in the Doubly-Connected Domain”. Bulletin of the Karaganda University. Mathematics Series 90, no. 2 (June 30, 2018): 18–24. Accessed August 23, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/192.