| Verified | Status | Citation | Memento |
|---|---|---|---|
| 2018.04.24 | a | https://ssrn.com/abstract=3054989 |
|
| 2018.04.24 | a | https://ssrn.com/abstract=2905847 | |
| 2018.04.24 | a | https://ssrn.com/abstract=3054989 |