| article html file updated | 8 February 2020 02:51 CET | Update | https://www.mdpi.com/2073-4441/9/4/234 |
| article html file updated | 24 September 2019 03:45 CEST | Update | - |
| article html file updated | 4 May 2019 03:42 CEST | Update | - |
| article html file updated | 28 April 2017 11:18 CEST | Update | - |
| article html file updated | 11 April 2017 04:12 CEST | Original file | - |
| article xml uploaded. | 11 April 2017 04:10 CEST | Original file | https://www.mdpi.com/2073-4441/9/4/234/xml |
| article pdf uploaded. | 11 April 2017 04:10 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/234/pdf |
