| article html file updated | 8 February 2020 07:30 CET | Update | https://www.mdpi.com/2073-4441/9/6/401 |
| article html file updated | 25 September 2019 04:21 CEST | Update | - |
| article html file updated | 3 May 2019 18:55 CEST | Update | - |
| article html file updated | 29 June 2017 12:12 CEST | Update | - |
| article html file updated | 5 June 2017 11:39 CEST | Original file | - |
| article xml uploaded. | 5 June 2017 11:38 CEST | Original file | https://www.mdpi.com/2073-4441/9/6/401/xml |
| article pdf uploaded. | 5 June 2017 11:38 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/6/401/pdf |
