Schindler, Norbert; Erker, Erich: 'GNSS-based tolling: standards and implementations' (Transportation, 2018), 'Road Pricing: Technologies, economics and acceptability', Chap. 16, pp. 403-444, DOI: 10.1049/PBTR008E_ch16
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1vtelo4e04inj.x-iet-live-01content/books/10.1049/pbtr008e_ch16