Sutton, Andy: 'Mobile backhaul evolution: from GSMto LTE-Advanced' (Telecommunications, 2017), 'Access, Fronthaul and Backhaul Networks for 5G & Beyond', Chap. 11, pp. 251-281, DOI: 10.1049/PBTE074E_ch11
IET Digital Library, https://digital-library.theiet.org/;jsessionid=e7ghagiqp3ajf.x-iet-live-01content/books/10.1049/pbte074e_ch11