1. Norma UNE-EN ISO 9999:2017. Productos de apoyo para personas con discapacidad. Clasificación y terminología. (ISO 9999:2016). [Acceso 7 septiembre 2017]. Disponible en: https://www.aenor.es/aenor/normas/normas/fichanorma.asp?tipo=N&codigo=N0058322&PDF=Si#.WbERi8jyhPY.
2. ISO 9999:2016 Assistive products for persons with disability – Classification and terminology. [Acceso 7 septiembre 2017]. Disponible en: https://www.iso.org/standard/60547.html.
3. ISO 8549-1:1989 Prosthetics and orthotics – Vocabulary – Part 1: General terms for external limb prostheses and external orthoses. Reviewed and confirmed in 2011. Geneva, Switzerland, International Organization for Standardization.
4. ISO 8549-3:1989 Prosthetics and orthotics – Vocabulary – Part 3: Terms relating to external orthoses. Reviewed and confirmed in 2011. Geneva, Switzerland, International Organization for Standardization.
5. ISO 8551:2003 Prosthetics and orthotics – Functional deficiencies – Description of the person to be treated with an orthosis, clinical objectives of treatment, and functional requirements of the orthosis. Reviewed and confirmed in 2015. Geneva, Switzerland, International Organization for Standardization.