| article html file updated | 23 February 2021 07:27 CET | Update | https://www.mdpi.com/2079-3200/4/2/6 |
| article html file updated | 7 February 2020 09:35 CET | Update | - |
| article html file updated | 21 September 2019 18:16 CEST | Update | - |
| article html file updated | 5 May 2019 14:03 CEST | Update | - |
| article html file updated | 27 March 2019 06:20 CET | Update | - |
| article html file updated | 1 June 2016 10:22 CEST | Original file | - |
| article xml uploaded. | 1 June 2016 10:21 CEST | Original file | https://www.mdpi.com/2079-3200/4/2/6/xml |
| article pdf uploaded. | 1 June 2016 10:21 CEST | Version of Record | https://www.mdpi.com/2079-3200/4/2/6/pdf |
