The Wayback Machine - https://web.archive.org/web/20210923024313/http://nblib.library.kz/elib/library.kz/jurnal/%D0%94%D0%BE%D0%BA%D0%BB%D0%B0%D0%B4_06_2017%20(2)/12-%20Biology%20E.E.Ashirbekov0617.pdf