| article html file updated | 7 February 2020 22:45 CET | Update | https://www.mdpi.com/2071-1050/9/2/221 |
| article html file updated | 23 September 2019 04:22 CEST | Update | - |
| article html file updated | 4 May 2019 12:33 CEST | Update | - |
| article html file updated | 1 March 2017 10:31 CET | Update | - |
| article html file updated | 6 February 2017 14:01 CET | Original file | - |
| article xml uploaded. | 6 February 2017 14:00 CET | Update | https://www.mdpi.com/2071-1050/9/2/221/xml |
| article xml uploaded. | 6 February 2017 14:00 CET | Original file | - |
| article pdf uploaded. | 6 February 2017 14:00 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/221/pdf |
