https://avtoreferats.com/2020/12/10/%d8%aa%d8%b5%d9%85%d9%8a%d9%85-%d9%85%d9%86%d8%b2%d9%84-%d8%af%d9%88%d8%b1-%d9%88%d8%a7%d8%ad%d8%af/