| article html file updated | 7 February 2020 20:27 CET | Update | https://www.mdpi.com/2071-1050/9/1/40 |
| article html file updated | 22 September 2019 16:04 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:30 CEST | Update | N/A |
| article html file updated | 7 February 2017 09:47 CET | Update | N/A |
| article html file updated | 28 December 2016 11:40 CET | Original file | N/A |
| article xml uploaded. | 28 December 2016 11:36 CET | Original file | https://www.mdpi.com/2071-1050/9/1/40/xml |
| article pdf uploaded. | 28 December 2016 11:36 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/40/pdf |
