| article html file updated | 8 February 2020 03:15 CET | Update | https://www.mdpi.com/2073-4441/9/4/253 |
| article html file updated | 24 September 2019 05:54 CEST | Update | - |
| article html file updated | 4 May 2019 02:51 CEST | Update | - |
| article html file updated | 28 April 2017 11:22 CEST | Update | - |
| article html file updated | 10 April 2017 11:25 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 11:24 CEST | Original file | https://www.mdpi.com/2073-4441/9/4/253/xml |
| article pdf uploaded. | 10 April 2017 11:24 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/253/pdf |
