“Bekishev K.B., Auyelbekova A.K., Alzhapparova N.A. Soil contamination by heavy metals (for example, the village Zhairem): Карагандинский государственный университет им. Е.A. Букетова, Республика Казахстан, г. Караганда”, EJE, vol. 46, no. 1, pp. 32–40, Oct. 2018, Accessed: Jul. 18, 2026. [Online]. Available: https://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/841