| article html file updated | 8 February 2020 02:23 CET | Update | https://www.mdpi.com/2073-4441/9/4/237 |
| article html file updated | 24 September 2019 01:02 CEST | Update | - |
| article html file updated | 4 May 2019 04:44 CEST | Update | - |
| article html file updated | 28 April 2017 11:18 CEST | Update | - |
| article html file updated | 28 March 2017 10:55 CEST | Original file | - |
| article xml uploaded. | 28 March 2017 10:54 CEST | Original file | https://www.mdpi.com/2073-4441/9/4/237/xml |
| article pdf uploaded. | 28 March 2017 10:53 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/237/pdf |
