| article html file updated | 8 February 2020 07:42 CET | Update | https://www.mdpi.com/2073-4441/9/6/406 |
| article html file updated | 25 September 2019 05:29 CEST | Update | - |
| article html file updated | 3 May 2019 18:32 CEST | Update | - |
| article html file updated | 29 June 2017 12:13 CEST | Update | - |
| article html file updated | 7 June 2017 13:33 CEST | Original file | - |
| article xml uploaded. | 7 June 2017 13:32 CEST | Original file | https://www.mdpi.com/2073-4441/9/6/406/xml |
| article pdf uploaded. | 7 June 2017 13:32 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/6/406/pdf |
