Lubkov, M., Zezekalo, I. and Soloviev, V. 2022. Approval of the combined reserve calculation method (Chervonozayarske Gas Field as an example). Technology audit and production reserves. 4, 1(66) (Aug. 2022), 30–36. DOI:https://doi.org/10.15587/2706-5448.2022.263747.