| article html file updated | 7 February 2020 21:19 CET | Update | https://www.mdpi.com/2079-9292/6/1/9 |
| article html file updated | 22 September 2019 20:33 CEST | Update | - |
| article html file updated | 4 May 2019 15:38 CEST | Update | - |
| article html file updated | 29 March 2017 10:16 CEST | Update | - |
| article html file updated | 12 January 2017 11:05 CET | Original file | - |
| article xml uploaded. | 12 January 2017 11:03 CET | Update | https://www.mdpi.com/2079-9292/6/1/9/xml |
| article xml uploaded. | 12 January 2017 11:03 CET | Original file | - |
| article pdf uploaded. | 12 January 2017 11:03 CET | Version of Record | https://www.mdpi.com/2079-9292/6/1/9/pdf |
