| article html file updated | 9 February 2020 04:54 CET | Update | https://www.mdpi.com/2410-387X/2/1/4 |
| article html file updated | 30 September 2019 08:46 CEST | Update | N/A |
| article html file updated | 1 May 2019 22:23 CEST | Update | N/A |
| article html file updated | 17 April 2019 21:06 CEST | Update | N/A |
| article html file updated | 28 March 2019 19:33 CET | Update | N/A |
| article html file updated | 30 January 2018 15:49 CET | Original file | N/A |
| article xml uploaded. | 30 January 2018 15:48 CET | Original file | https://www.mdpi.com/2410-387X/2/1/4/xml |
| article pdf uploaded. | 30 January 2018 15:48 CET | Version of Record | https://www.mdpi.com/2410-387X/2/1/4/pdf |
