1. {n. d.}. Cross Promotion. https://en.wikipedia.org/wiki/Cross-promotion {n. d.}. Cross Promotion. https://en.wikipedia.org/wiki/Cross-promotion
2. {n. d.}. Detecting and Avoiding Bucket Imbalance in A/B Tests. {n. d.}. Detecting and Avoiding Bucket Imbalance in A/B Tests.
3. Designing and deploying online field experiments
4. George EP Box J Stuart Hunter and William Gordon Hunter. 2005. Statistics for experimenters: design innovation and discovery. Vol. 2. Wiley-Interscience New York. George EP Box J Stuart Hunter and William Gordon Hunter. 2005. Statistics for experimenters: design innovation and discovery. Vol. 2. Wiley-Interscience New York.
5. Seven pitfalls to avoid when running controlled experiments on the web