Melnyk, V. M., and M. M. Hnyp. 2026. “Improving the Environmental Safety of the D21A1 Diesel Engine by Ensuring Its Operation on the Gas-Diesel Cycle Using Biogas Fuel”. Oil and Gas Power Engineering, no. 1(45) (May):211-22. https://doi.org/10.31471/1993-9868-2026-1(45)-211-222.