1. AENOR (Spanish Association for Standardisation and Certification). Geometrical Product Specifications (GPS)-Surface texture: Profile method-Terms, definitions and surface texture parameters-UNE-EN ISO 4287:1999/A1:2010.
2. AENOR (Spanish Association for Standardisation and Certification). Geometrical Product Specifications (GPS)-Surface texture: Profile method. Rules and procedures for the assessment of surface texture-UNE-EN ISO 4288:1998.
3. AENOR (Spanish Association for Standardisation and Certification). Geometrical Product Specifications (GPS)-Surface texture: Profile method. Metrological characteristics of phase correct filters-UNE-EN ISO 11562:1998.
4. AENOR (Spanish Association for Standardisation and Certification). Geometrical product specifications (GPS)-Surface texture: Areal-Part 2: Terms, definitions and surface texture parameters-UNE-EN ISO 25178-2:2013.
5. AENOR (Spanish Association for Standardisation and Certification). Geometrical product specifications (GPS)-Geometrical tolerancing-Tolerances of form, orientation, location and run-out -UNE-EN ISO 1101:2013.