| article html file updated | 7 February 2020 21:17 CET | Update | https://www.mdpi.com/2071-1050/9/1/87 |
| article html file updated | 22 September 2019 20:23 CEST | Update | - |
| article html file updated | 4 May 2019 15:44 CEST | Update | - |
| article html file updated | 7 February 2017 10:10 CET | Update | - |
| article html file updated | 12 January 2017 03:44 CET | Original file | - |
| article xml uploaded. | 12 January 2017 03:43 CET | Original file | https://www.mdpi.com/2071-1050/9/1/87/xml |
| article pdf uploaded. | 12 January 2017 03:43 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/87/pdf |
