Hussein Dia, : 'Urban mobility: challenges and opportunities' (Transportation, 2017), 'Low Carbon Mobility for Future Cities: Principles and applications', Chap. 2, pp. 13-39, DOI: 10.1049/PBTR006E_ch2
IET Digital Library, https://digital-library.theiet.org/;jsessionid=4uo71qb8ffd1g.x-iet-live-01content/books/10.1049/pbtr006e_ch2