| article html file updated | 9 February 2020 05:09 CET | Update | https://www.mdpi.com/2413-8851/2/1/13 |
| article html file updated | 30 September 2019 10:16 CEST | Update | - |
| article html file updated | 1 May 2019 21:49 CEST | Update | - |
| article html file updated | 17 April 2019 20:38 CEST | Update | - |
| article html file updated | 28 March 2019 20:06 CET | Update | - |
| article html file updated | 1 February 2018 14:25 CET | Original file | - |
| article xml uploaded. | 1 February 2018 09:27 CET | Original file | https://www.mdpi.com/2413-8851/2/1/13/xml |
| article pdf uploaded. | 1 February 2018 09:27 CET | Version of Record | https://www.mdpi.com/2413-8851/2/1/13/pdf |
