| article html file updated | 7 February 2020 21:03 CET | Update | https://www.mdpi.com/2071-1050/9/1/81 |
| article html file updated | 22 September 2019 19:27 CEST | Update | - |
| article html file updated | 4 May 2019 16:12 CEST | Update | - |
| article html file updated | 7 February 2017 10:08 CET | Update | - |
| article html file updated | 9 January 2017 13:57 CET | Original file | - |
| article xml uploaded. | 9 January 2017 13:56 CET | Original file | https://www.mdpi.com/2071-1050/9/1/81/xml |
| article pdf uploaded. | 9 January 2017 13:56 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/81/pdf |
