Mukherjee, Ushnik; Walker, Sean B.; Fowler, Michael: 'Power-to-Gas in an ancillary service market' (Energy Engineering, 2016), 'Methane and Hydrogen for Energy Storage', Chap. 5, pp. 81-103, DOI: 10.1049/PBPO101E_ch5
IET Digital Library, https://digital-library.theiet.org/;jsessionid=a7ikqxupxkgi.x-iet-live-01content/books/10.1049/pbpo101e_ch5