| article html file updated | 7 February 2020 06:23 CET | Update | https://www.mdpi.com/1424-8220/16/4/439 |
| article html file updated | 5 May 2019 20:28 CEST | Update | - |
| article html file updated | 27 March 2019 00:18 CET | Update | - |
| article html file updated | 29 April 2016 04:16 CEST | Update | - |
| article html file updated | 25 March 2016 08:54 CET | Original file | - |
| article xml uploaded. | 25 March 2016 08:52 CET | Original file | https://www.mdpi.com/1424-8220/16/4/439/xml |
| article pdf uploaded. | 25 March 2016 08:52 CET | Version of Record | https://www.mdpi.com/1424-8220/16/4/439/pdf |
