| article html file updated | 7 February 2020 04:25 CET | Update | https://www.mdpi.com/1424-8220/16/2/209 |
| article html file updated | 6 May 2019 00:41 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:25 CET | Original file | N/A |
| article pdf uploaded. | 6 February 2016 09:49 CET | Version of Record | https://www.mdpi.com/1424-8220/16/2/209/pdf |
| article xml uploaded. | 6 February 2016 09:49 CET | Original file | https://www.mdpi.com/1424-8220/16/2/209/xml |
