Table 2.

Summary of documentary sources of evidence

SourcesType of document
Road transport passenger companiesAnnual reports, stand-alone sustainability reports and NFI statements
Professional organisationsProfessional reports, technical articles and technical reports
GovernmentLaw 2/2011 on Sustainable Economy Law 11/2018 on NFI
Media reports and blogsArticles published on relevant media covering events regarding the impact of the Spanish NFI and the process of development
Source(s): Authors’ own work
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