| article html file updated | 7 February 2020 20:40 CET | Update | https://www.mdpi.com/2071-1050/9/1/59 |
| article html file updated | 22 September 2019 17:14 CEST | Update | - |
| article html file updated | 4 May 2019 17:02 CEST | Update | - |
| article html file updated | 7 February 2017 09:54 CET | Update | - |
| article html file updated | 4 January 2017 10:43 CET | Original file | - |
| article xml uploaded. | 4 January 2017 10:42 CET | Original file | https://www.mdpi.com/2071-1050/9/1/59/xml |
| article pdf uploaded. | 4 January 2017 10:42 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/1/59/pdf |
| article pdf uploaded. | 1 January 2017 10:17 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/59/pdf-vor |
