| article html file updated | 8 February 2020 08:04 CET | Update | https://www.mdpi.com/2073-4441/9/6/423 |
| article html file updated | 25 September 2019 07:18 CEST | Update | - |
| article html file updated | 3 May 2019 17:51 CEST | Update | - |
| article html file updated | 29 June 2017 12:16 CEST | Update | - |
| article html file updated | 12 June 2017 11:59 CEST | Original file | - |
| article xml uploaded. | 12 June 2017 11:57 CEST | Update | https://www.mdpi.com/2073-4441/9/6/423/xml |
| article pdf uploaded. | 12 June 2017 11:57 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/6/423/pdf |
