| article html file updated | 8 February 2020 08:15 CET | Update | https://www.mdpi.com/2073-4360/9/6/224 |
| article html file updated | 25 September 2019 08:10 CEST | Update | - |
| article html file updated | 3 May 2019 17:33 CEST | Update | - |
| article html file updated | 18 March 2019 05:59 CET | Update | - |
| article html file updated | 28 June 2017 14:23 CEST | Update | - |
| article html file updated | 14 June 2017 16:28 CEST | Original file | - |
| article xml uploaded. | 14 June 2017 16:26 CEST | Original file | https://www.mdpi.com/2073-4360/9/6/224/xml |
| article pdf uploaded. | 14 June 2017 16:26 CEST | Version of Record | https://www.mdpi.com/2073-4360/9/6/224/pdf |
