| article html file updated | 8 February 2020 08:47 CET | Update | https://www.mdpi.com/2073-4360/9/6/236 |
| article html file updated | 25 September 2019 11:04 CEST | Update | - |
| article html file updated | 3 May 2019 16:30 CEST | Update | - |
| article html file updated | 18 March 2019 06:02 CET | Update | - |
| article html file updated | 28 June 2017 14:26 CEST | Update | - |
| article html file updated | 20 June 2017 13:12 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 13:10 CEST | Original file | https://www.mdpi.com/2073-4360/9/6/236/xml |
| article pdf uploaded. | 20 June 2017 13:10 CEST | Version of Record | https://www.mdpi.com/2073-4360/9/6/236/pdf |
