| article html file updated | 7 February 2020 06:36 CET | Update | https://www.mdpi.com/1424-8220/16/4/457 |
| article html file updated | 5 May 2019 20:01 CEST | Update | - |
| article html file updated | 27 March 2019 00:39 CET | Update | - |
| article html file updated | 29 April 2016 04:25 CEST | Update | - |
| article html file updated | 30 March 2016 08:31 CEST | Original file | - |
| article xml uploaded. | 30 March 2016 08:30 CEST | Original file | https://www.mdpi.com/1424-8220/16/4/457/xml |
| article pdf uploaded. | 30 March 2016 08:30 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/457/pdf |
