| article html file updated | 7 February 2020 22:00 CET | Update | https://www.mdpi.com/2073-4409/6/1/2 |
| article html file updated | 23 September 2019 00:19 CEST | Update | - |
| article html file updated | 4 May 2019 14:02 CEST | Update | - |
| article html file updated | 27 October 2017 09:10 CEST | Update | - |
| article html file updated | 30 March 2017 11:32 CEST | Update | - |
| article html file updated | 22 January 2017 11:26 CET | Original file | - |
| article xml uploaded. | 22 January 2017 11:24 CET | Update | https://www.mdpi.com/2073-4409/6/1/2/xml |
| article xml uploaded. | 22 January 2017 11:24 CET | Original file | - |
| article pdf uploaded. | 22 January 2017 11:24 CET | Version of Record | https://www.mdpi.com/2073-4409/6/1/2/pdf |
