| article html file updated | 7 February 2020 22:33 CET | Update | https://www.mdpi.com/2071-1050/9/2/201 |
| article html file updated | 23 September 2019 03:15 CEST | Update | - |
| article html file updated | 4 May 2019 12:57 CEST | Update | - |
| article html file updated | 1 March 2017 10:28 CET | Update | - |
| article html file updated | 10 February 2017 10:17 CET | Original file | - |
| article xml uploaded. | 10 February 2017 10:16 CET | Original file | https://www.mdpi.com/2071-1050/9/2/201/xml |
| article pdf uploaded. | 10 February 2017 10:16 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/2/201/pdf |
| article pdf uploaded. | 1 February 2017 11:13 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/201/pdf-vor |
