| article html file updated | 8 February 2020 03:00 CET | Update | https://www.mdpi.com/2071-1050/9/4/556 |
| article html file updated | 24 September 2019 04:33 CEST | Update | - |
| article html file updated | 4 May 2019 03:21 CEST | Update | - |
| article html file updated | 28 April 2017 10:55 CEST | Update | - |
| article html file updated | 6 April 2017 12:07 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 12:05 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/556/xml |
| article pdf uploaded. | 6 April 2017 12:05 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/556/pdf |
