| article html file updated | 7 February 2020 22:14 CET | Update | https://www.mdpi.com/2071-1050/9/2/172 |
| article html file updated | 23 September 2019 01:35 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:34 CEST | Update | N/A |
| article html file updated | 1 March 2017 10:23 CET | Update | N/A |
| article html file updated | 25 January 2017 11:35 CET | Original file | N/A |
| article xml uploaded. | 25 January 2017 11:33 CET | Original file | https://www.mdpi.com/2071-1050/9/2/172/xml |
| article pdf uploaded. | 25 January 2017 11:33 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/172/pdf |
