Khokhlova, Olga. “Rapid Change in Chernozem Properties During Their Holocene Evolution: A Case Study of Paleosols Buried under Kurgans in the Pre-Ural Steppe, Russia”. Revista Mexicana de Ciencias Geológicas 24, no. 2 (February 19, 2018): 270–282. Accessed March 17, 2025. https://rmcg.unam.mx/index.php/rmcg/article/view/747.