1. Well integrity in drilling and well operations NORSOK D-010:2021”, Norwegian Standard AS.
2. Patent 3860066 (USA).
3. Patent 3874634A (USA).
4. American Petroleum Institute API, publications.
5. Hopmans P. Journey of Well Integrity, 2013. https://webevents.spe.org/products/journey-of-well-integrity.