| article html file updated | 7 February 2020 20:36 CET | Update | https://www.mdpi.com/2071-1050/9/1/56 |
| article html file updated | 22 September 2019 16:54 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:11 CEST | Update | N/A |
| article html file updated | 7 February 2017 09:53 CET | Update | N/A |
| article html file updated | 31 December 2016 10:16 CET | Update | N/A |
| article xml uploaded. | 31 December 2016 10:15 CET | Update | https://www.mdpi.com/2071-1050/9/1/56/xml |
| article xml uploaded. | 31 December 2016 10:15 CET | Update | N/A |
| article pdf uploaded. | 31 December 2016 10:15 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/1/56/pdf |
| article html file updated | 31 December 2016 10:00 CET | Original file | N/A |
| article xml uploaded. | 31 December 2016 09:59 CET | Update | N/A |
| article xml uploaded. | 31 December 2016 09:59 CET | Original file | N/A |
| article pdf uploaded. | 31 December 2016 09:59 CET | Version of Record | N/A |
