| article html file updated | 8 February 2020 17:11 CET | Update | https://www.mdpi.com/2079-9721/5/4/20 |
| article html file updated | 27 September 2019 09:18 CEST | Update | N/A |
| article html file updated | 3 May 2019 00:00 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:44 CET | Update | N/A |
| article html file updated | 26 September 2017 14:21 CEST | Original file | N/A |
| article xml uploaded. | 26 September 2017 14:20 CEST | Original file | https://www.mdpi.com/2079-9721/5/4/20/xml |
| article pdf uploaded. | 26 September 2017 14:20 CEST | Version of Record | https://www.mdpi.com/2079-9721/5/4/20/pdf |
