| article html file updated | 8 February 2020 02:46 CET | Update | https://www.mdpi.com/2071-1050/9/4/542 |
| article html file updated | 24 September 2019 03:16 CEST | Update | - |
| article html file updated | 4 May 2019 03:52 CEST | Update | - |
| article html file updated | 28 April 2017 10:53 CEST | Update | - |
| article pdf uploaded. | 6 April 2017 10:46 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/542/pdf |
| article html file updated | 1 April 2017 11:59 CEST | Original file | - |
| article xml uploaded. | 1 April 2017 11:58 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/542/xml |
