| article html file updated | 8 February 2020 02:38 CET | Update | https://www.mdpi.com/2071-1050/9/4/531 |
| article html file updated | 24 September 2019 02:26 CEST | Update | - |
| article html file updated | 4 May 2019 04:12 CEST | Update | - |
| article html file updated | 28 April 2017 10:51 CEST | Update | - |
| article html file updated | 31 March 2017 11:21 CEST | Original file | - |
| article xml uploaded. | 31 March 2017 11:20 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/531/xml |
| article pdf uploaded. | 31 March 2017 11:20 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/531/pdf |
