| article html file updated | 7 February 2020 20:09 CET | Update | https://www.mdpi.com/2071-1050/9/1/7 |
| article html file updated | 22 September 2019 14:20 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:08 CEST | Update | N/A |
| article html file updated | 7 February 2017 09:26 CET | Update | N/A |
| article html file updated | 22 December 2016 12:12 CET | Original file | N/A |
| article xml uploaded. | 22 December 2016 12:11 CET | Update | https://www.mdpi.com/2071-1050/9/1/7/xml |
| article xml uploaded. | 22 December 2016 12:11 CET | Original file | N/A |
| article pdf uploaded. | 22 December 2016 12:11 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/7/pdf |
