| article html file updated | 8 February 2020 03:24 CET | Update | https://www.mdpi.com/2073-4441/9/4/272 |
| article html file updated | 24 September 2019 06:43 CEST | Update | - |
| article html file updated | 4 May 2019 02:33 CEST | Update | - |
| article html file updated | 28 April 2017 11:27 CEST | Update | - |
| article html file updated | 12 April 2017 10:59 CEST | Original file | - |
| article xml uploaded. | 12 April 2017 10:57 CEST | Original file | https://www.mdpi.com/2073-4441/9/4/272/xml |
| article pdf uploaded. | 12 April 2017 10:57 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/272/pdf |
