| article html file updated | 23 February 2021 07:26 CET | Update | https://www.mdpi.com/2079-3200/3/4/160 |
| article html file updated | 7 February 2020 02:21 CET | Update | - |
| article html file updated | 21 September 2019 08:05 CEST | Update | - |
| article html file updated | 6 May 2019 04:44 CEST | Update | - |
| article html file updated | 26 March 2019 16:40 CET | Original file | - |
| article pdf uploaded. | 17 December 2015 15:56 CET | Version of Record | https://www.mdpi.com/2079-3200/3/4/160/pdf |
| article xml uploaded. | 17 December 2015 15:56 CET | Original file | https://www.mdpi.com/2079-3200/3/4/160/xml |
