1. Architecting for the cloud: https://d1.awsstatic.com/whitepapers/AWS_Cloud_Best_Practices.pdf (Archived)
2. Whitepapers related to well-architected framework are mentioned here: https://aws.amazon.com/blogs/aws/aws-well-architected-framework-updated-white-papers-tools-and-best-practices/
3. Disaster recovery whitepaper: https://d1.awsstatic.com/whitepapers/aws-disaster-recovery.pdf (Archived)
AWS now recommends a well-architected framework whitepaper: https://d1.awsstatic.com/whitepapers/architecture/AWS_Well-Architected_Framework.pdf