| DOI | https://doi.org/10.48597/ESYM-57HD |
|---|---|
| Start time | 1 January 1990 |
| Stop time | 1 January 1993 |
| Valid from | 10 December 2018 13:30:00 |
| Valid to | 2 December 2024 12:31:27 |
| DOI | https://doi.org/10.48597/Z8MY-F7SM |
|---|---|
| Start time | 1 January 1990 |
| Stop time | 1 January 1993 |
| Valid from | 1 May 2014 00:00:00 |
| Valid to | 10 December 2018 13:30:00 |