Exergy-based ecological performance of an irreversible Otto cycle with temperature-linear-relation variable specific heat of working fluidYanlin Ge, Lingen Chen, Xiaoyong Qin and Zhihui XieEur. Phys. J. Plus, 132 5 (2017) 209DOI: https://doi.org/10.1140/epjp/i2017-11485-9