| article html file updated | 7 February 2020 20:37 CET | Update | https://www.mdpi.com/2071-1050/9/1/55 |
| article html file updated | 22 September 2019 16:59 CEST | Update | - |
| article html file updated | 4 May 2019 17:09 CEST | Update | - |
| article html file updated | 7 February 2017 09:52 CET | Update | - |
| article html file updated | 1 January 2017 03:16 CET | Original file | - |
| article xml uploaded. | 1 January 2017 03:15 CET | Original file | https://www.mdpi.com/2071-1050/9/1/55/xml |
| article pdf uploaded. | 1 January 2017 03:15 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/55/pdf |
