| article html file updated | 7 February 2020 20:26 CET | Update | https://www.mdpi.com/2410-3896/2/1/2 |
| article html file updated | 4 May 2019 17:31 CEST | Update | N/A |
| article html file updated | 27 October 2017 08:59 CEST | Update | N/A |
| article html file updated | 28 December 2016 11:00 CET | Original file | N/A |
| article xml uploaded. | 28 December 2016 10:51 CET | Original file | https://www.mdpi.com/2410-3896/2/1/2/xml |
| article pdf uploaded. | 28 December 2016 10:51 CET | Version of Record | https://www.mdpi.com/2410-3896/2/1/2/pdf |
