D. DIMA, A. DOBROVICESCU, C. IONIŢĂ, and C. DOBRE, “EXERGY ANALYSIS OF THE COUPLING OF TWO CO2 HEAT PUMP CYCLES: Exergy analysis of the coupling of two CO2 heat pump cycles”, RRST-EE, vol. 68, no. 2, pp. 236–240, July 2023, doi: 10.59277/RRST-EE.2023.68.2.20.