E. Bellos, C. Tzivanidis, and I. Daniil, “Energetic and exergetic investigation of a parabolic trough collector with internal fins operating with carbon dioxide”, Int. J. Energy Environ. Eng., vol. 8, no. 2 (June 2017), Feb. 2017, doi: 10.1007/s40095-017-0229-5.