| article html file updated | 7 February 2020 20:34 CET | Update | https://www.mdpi.com/2071-1050/9/1/49 |
| article html file updated | 22 September 2019 16:39 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:17 CEST | Update | N/A |
| article html file updated | 7 February 2017 09:50 CET | Update | N/A |
| article html file updated | 30 December 2016 10:43 CET | Original file | N/A |
| article xml uploaded. | 30 December 2016 10:42 CET | Original file | https://www.mdpi.com/2071-1050/9/1/49/xml |
| article pdf uploaded. | 30 December 2016 10:42 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/49/pdf |
