Fataliyev, H., Huseynova, S., Gadimova, N., Ismayilov, M., Heydarov, E. and Rushanov, A. 2026. Evaluation of the factors influencing the extraction and composition of biologically active substances from secondary raw materials. Eastern-European Journal of Enterprise Technologies. 1, 11 (139) (Feb. 2026), 34–45. DOI:https://doi.org/10.15587/1729-4061.2026.349976.