1. ADIF (2018). Accounts, p. 98. http://www.adifaltavelocidad.es/es_ES/empresas_servicios/doc/CCAA2018I.pdf
2. ADIF (2019a). Declaración sobre la red. Anexo P, http://www.adif.es/es_ES/conoceradif/doc/DR-19_V0_DocCompl.pdf retrieved on 14 December 2019.
3. ADIF (2019b). Press release November 22nd, 2019 http://prensa.adifaltavelocidad.es/nde/u08/GAP/Prensa.nsf/Vo000A/BB9015899FE33E29C12584BA00494C43?Opendocument retrieved on 14 December 2019.
4. Auctions of rail capacity?
5. Ait A., Eliasson J. (2019). Railway capacity allocation: a survey of market organizations, allocation processes and track access charges. Working Papers 2019:1, Swedish National Road & Transport Research Institute (VTI).