| article html file updated | 7 February 2020 23:05 CET | Update | https://www.mdpi.com/2073-4360/9/2/57 |
| article html file updated | 23 September 2019 06:17 CEST | Update | - |
| article html file updated | 4 May 2019 11:51 CEST | Update | - |
| article html file updated | 20 March 2019 06:36 CET | Update | - |
| article html file updated | 1 March 2017 11:14 CET | Update | - |
| article html file updated | 10 February 2017 12:33 CET | Original file | - |
| article xml uploaded. | 10 February 2017 12:32 CET | Original file | https://www.mdpi.com/2073-4360/9/2/57/xml |
| article pdf uploaded. | 10 February 2017 12:32 CET | Version of Record | https://www.mdpi.com/2073-4360/9/2/57/pdf |
