| article html file updated | 7 February 2020 23:20 CET | Update | https://www.mdpi.com/2073-4360/9/2/61 |
| article html file updated | 23 September 2019 07:37 CEST | Update | - |
| article html file updated | 4 May 2019 11:22 CEST | Update | - |
| article html file updated | 20 March 2019 06:38 CET | Update | - |
| article html file updated | 1 March 2017 11:15 CET | Update | - |
| article html file updated | 14 February 2017 10:06 CET | Original file | - |
| article xml uploaded. | 14 February 2017 10:05 CET | Original file | https://www.mdpi.com/2073-4360/9/2/61/xml |
| article pdf uploaded. | 14 February 2017 10:05 CET | Version of Record | https://www.mdpi.com/2073-4360/9/2/61/pdf |
