1 January 2019 - 1 January 2020
| DOI | https://doi.org/10.48597/BU54-EVFC |
|---|---|
| Start time | 1 January 2019 |
| Stop time | 1 January 2020 |
| Valid since | 14 September 2021 12:50:58 |
| DOI | https://doi.org/10.48597/BU54-EVFC |
|---|---|
| Start time | 1 January 2019 |
| Stop time | 1 January 2020 |
| Valid since | 14 September 2021 12:50:58 |
| DOI | https://doi.org/10.48597/WFVT-T5KX |
|---|---|
| Start time | 1 January 2019 |
| Stop time | 20 April 2020 |
| Valid from | 8 September 2020 11:53:41 |
| Valid to | 14 September 2021 12:50:58 |
| DOI | https://doi.org/10.48597/7XF7-EWTK |
|---|---|
| Start time | 1 January 2019 |
| Stop time | 1 January 2020 |
| Valid from | 8 September 2020 11:35:43 |
| Valid to | 8 September 2020 11:53:41 |