| article html file updated | 7 February 2020 19:32 CET | Update | https://www.mdpi.com/2310-2861/2/4/30 |
| article html file updated | 22 September 2019 11:01 CEST | Update | N/A |
| article html file updated | 4 May 2019 19:26 CEST | Update | N/A |
| article html file updated | 13 December 2016 10:33 CET | Original file | N/A |
| article xml uploaded. | 13 December 2016 10:31 CET | Update | https://www.mdpi.com/2310-2861/2/4/30/xml |
| article xml uploaded. | 13 December 2016 10:31 CET | Original file | N/A |
| article pdf uploaded. | 13 December 2016 10:31 CET | Version of Record | https://www.mdpi.com/2310-2861/2/4/30/pdf |
