Toktar, Murat, и Akhmetov M.B. «CHANGES IN MORPHOGENETIC AND PHYSICAL PROPERTIES OF LEACHED BLACK SOILS: Physics Soil». Academic Journal of Physical and Chemical Sciences, no. 6 (декабрь 15, 2021): 114–119. просмотрено декабрь 15, 2025. http://89.250.84.46/reports-science/article/view/2578.