1. Muñoz Viñas S. Contemporary theory of conservation. Oxford: Elsevier Butterworth-Heinemann; 2005.
2. Wainwright INM. Examination of paintings by physical and chemical methods, in shared responsibility. In: Ramsay-Jolicœur BA, Wainwright INM, eds. Proceedings of a seminar for curators and conservators. Ottawa: National Gallery of Canada; 1989. p. 79–102.
3. Dagobert Soergel. Knowledge organization systems. Overview. 1st ed. Alexandria. http://www.dsoergel.com/UBLIS514DS-08.2a-1Reading4SoergelKOSOverview.pdf . Accessed 8 Jun 2017.
4. Tudhope D, Koch T, Heery R. Terminology services and technology: JISC state of the art review. 2006. http://opus.bath.ac.uk/23563/1/terminology_services_and_technology_review_sep_06.pdf . Accessed 27 May 2017.
5. Hodge GM. Knowledge organization systems: an overview. In: Systems of knowledge organization for digital libraries : beyond traditional authority files. Digital library federation, council on library and information resources; 2000. p. 37. Available from: https://www.clir.org/pubs/reports/pub91 . Accessed 8 Jun 2017.