| article html file updated | 7 February 2020 20:34 CET | Update | https://www.mdpi.com/2071-1050/9/1/54 |
| article html file updated | 22 September 2019 16:42 CEST | Update | - |
| article html file updated | 4 May 2019 17:16 CEST | Update | - |
| article html file updated | 7 February 2017 09:52 CET | Update | - |
| article html file updated | 30 December 2016 11:15 CET | Original file | - |
| article xml uploaded. | 30 December 2016 11:14 CET | Original file | https://www.mdpi.com/2071-1050/9/1/54/xml |
| article pdf uploaded. | 30 December 2016 11:14 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/54/pdf |
