1. ISO/IEC 27017:2015. 2021. Code of practice for information security controls based on ISO/IEC 27002 for cloud services. https://www.iso.org/standard/82878.html
2. ISO/IEC/IEEE 29119. 2021. Risk-based approach for testing. https://www.iso.org/obp/ui/#iso:std:iso-iec-ieee:29119:-2:ed-2:v1:en
3. NIST SP 800-144. 2011. Guidelines on Security and Privacy in Public Cloud Computing. https://csrc.nist.gov/pubs/sp/800/144/final
4. Study on Cloud Security Risk and Remedy
5. Evaluating strategies for study selection in systematic literature studies