ЕСМАҒАНБЕТОВ, M. А.; 						КУСАИНОВА, М. M..
 ЭЛЛИПС    ДОҒАСЫНЫҢ     ҰЗЫНДЫҒЫ.
<strong>SDU Bulletin: Natural and Technical Sciences</strong>, [S.l.], v. 53, n. 2, p. 11-20, dec. 2020.
Available at: &lt;<a href="https://journals.sdu.edu.kz/index.php/nts/article/view/331" target="_new">https://journals.sdu.edu.kz/index.php/nts/article/view/331</a>&gt;. Date accessed: 27 apr. 2025.
doi: <a href="https://doi.org/10.47344/sdubnts.v53i2.331">https://doi.org/10.47344/sdubnts.v53i2.331</a>.