| article html file updated | 7 February 2020 07:06 CET | Update | https://www.mdpi.com/1424-8220/16/4/521 |
| article html file updated | 5 May 2019 18:58 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:33 CET | Update | N/A |
| article html file updated | 29 April 2016 04:55 CEST | Update | N/A |
| article html file updated | 11 April 2016 13:39 CEST | Original file | N/A |
| article xml uploaded. | 11 April 2016 13:38 CEST | Update | https://www.mdpi.com/1424-8220/16/4/521/xml |
| article pdf uploaded. | 11 April 2016 13:38 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/521/pdf |
