“Note by the Parliamentary Adviser to the Environment Committee on Article 4.4 of the Government’s Bill Regulating the Legal Scheme for the Trade of Greenhouse Gas Emissions Allowances: Stemming from Royal Decree-Law 5 2004, of August 27”. Journal of the Cortes Generales, no. 73, Apr. 2008, pp. 189-95, https://doi.org/10.33426/rcg/2008/73/800.