1. Royal Decree 1088/2010, BOE 4th September 2010, 215: 76436–40.
2. Lluch Urpi J. Tecnología y margen de refino del petróleo, 1st ed. Ediciones Díaz de Santos SA, Madrid; 2008.
3. Burnett PT, Huff GA, Pradhan VR, Hodges M, Glassett JA, McDaniel SG, Hurst P. The European refining technology conference, Rome, Italy; November 13–15; 2000.
4. BP tests alkylation/fractionation process for sulphur removal. Octane Week 9.10.2000.