| Author       | Source       | 
| :-------------: |:-------------:|
| Richard B. Evans, Rabih Moussawi, Michael S. Pagano, John Sedunov  | [Wharton - UPenn](https://jacobslevycenter.wharton.upenn.edu/wp-content/uploads/2018/08/ETF-Short-Interest-and-Failures-to-Deliver.pdf) | 

---