1. ISO/IEC 2009 Industrial systems, installations and equipment and industrial products - structuring principles and reference designations - Part 1: Basic rules
2. ISO/IEC 2009 Industrial systems, installations and equipment and industrial products - structuring principles and reference designations - Part 2: Classifications of objects and code for classes
3. ISO 704 2009 Terminology work - Principles and methods
4. ISO 2013 Systems to manage terminology, knowledge and content - Concept-related aspects for developing and internationalizing classification systems
5. Conference Designation System for Coding System Objects;Balslev;INCOSE Insight Volume,2014