Zhapbasbayev, U., G. Ramazanov, and Z. Sattinova. “Research of Structural Changes in the Molding of Thermoplastic Slip Beryllium Oxide in Flat Spinneret”. Recent Contributions to Physics, vol. 2012, no. 2, June 2012, pp. 61-70, https://bph.kaznu.kz/index.php/zhuzhu/article/view/695.