| article html file updated | 7 February 2020 20:11 CET | Update | https://www.mdpi.com/2071-1050/9/1/13 |
| article html file updated | 22 September 2019 14:30 CEST | Update | - |
| article html file updated | 4 May 2019 18:04 CEST | Update | - |
| article html file updated | 7 February 2017 09:31 CET | Update | - |
| article html file updated | 23 December 2016 10:01 CET | Original file | - |
| article xml uploaded. | 23 December 2016 10:00 CET | Original file | https://www.mdpi.com/2071-1050/9/1/13/xml |
| article pdf uploaded. | 23 December 2016 10:00 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/13/pdf |
