Shpynova, N. V., Sartakov, M. P., Komissarov, I. D. and Grekhova, I. V. (2018) “Comparative characteristics of thermal stability of humic acids of sapropels of the middle ob region and south of OB-Irtysh Basin of Wstern Siberia”, Amazonia Investiga, 7(17), pp. 79–84. Available at: https://amazoniainvestiga.info/index.php/amazonia/article/view/330 (Accessed: 20 June 2025).