Optimum ecological performance of irreversible reciprocating Maisotsenko-Brayton cycle Jiafeng Shen, Lingen Chen, Yanlin Ge, Fuli Zhu and Zhixiang Wu Eur. Phys. J. Plus, 134 6 (2019) 293 Published online: 26 June 2019 DOI: 10.1140/epjp/i2019-12648-4