From Founders' Wiki
- Worklogistics: Virality Study
- Quora: What are some great examples of virality design patterns?
- David Skok: Lessons Learned – Viral Marketing
- Visualization of Wavii's viral loop & big influencers
- Adam Nash: User Acquisition - Viral Factor Basics
- Adam Nash: User Acquisition - Cycle Time Matters
- Andrew Chen: SaaS products aren’t viral