| article html file updated | 7 February 2020 15:59 CET | Update | https://www.mdpi.com/2079-6412/6/4/42 |
| article html file updated | 22 September 2019 02:16 CEST | Update | - |
| article html file updated | 5 May 2019 02:18 CEST | Update | - |
| article html file updated | 28 December 2016 08:28 CET | Update | - |
| article html file updated | 8 October 2016 09:12 CEST | Original file | - |
| article xml uploaded. | 8 October 2016 09:11 CEST | Original file | https://www.mdpi.com/2079-6412/6/4/42/xml |
| article pdf uploaded. | 8 October 2016 09:11 CEST | Updated version of record | https://www.mdpi.com/2079-6412/6/4/42/pdf |
| article pdf uploaded. | 5 October 2016 12:28 CEST | Version of Record | - |
