Performance assessment and optimization of an irreversible nano-scale Stirling engine cycle operating with Maxwell-Boltzmann gasMohammad H. Ahmadi, Mohammad-Ali Ahmadi and Fathollah PourfayazEur. Phys. J. Plus, 130 9 (2015) 190DOI: https://doi.org/10.1140/epjp/i2015-15190-5