| article html file updated | 8 February 2020 22:42 CET | Update | https://www.mdpi.com/2073-4360/9/12/661 |
| article html file updated | 28 September 2019 21:03 CEST | Update | - |
| article html file updated | 2 May 2019 11:38 CEST | Update | - |
| article html file updated | 18 April 2019 09:15 CEST | Update | - |
| article html file updated | 2 January 2018 14:36 CET | Update | - |
| article html file updated | 30 November 2017 17:23 CET | Original file | - |
| article xml uploaded. | 30 November 2017 16:12 CET | Original file | https://www.mdpi.com/2073-4360/9/12/661/xml |
| article pdf uploaded. | 30 November 2017 16:12 CET | Version of Record | https://www.mdpi.com/2073-4360/9/12/661/pdf |
