Constantin Carathéodory axiomatic approach and Grigory Perelman thermodynamics for geometric flows and cosmological solitonic solutionsIuliana Bubuianu and Sergiu I. VacaruEur. Phys. J. Plus, 136 5 (2021) 588DOI: https://doi.org/10.1140/epjp/s13360-021-01527-4