| article html file updated | 7 February 2020 07:04 CET | Update | https://www.mdpi.com/1424-8220/16/4/504 |
| article html file updated | 5 May 2019 19:03 CEST | Update | - |
| article html file updated | 27 March 2019 01:29 CET | Update | - |
| article html file updated | 29 April 2016 04:48 CEST | Update | - |
| article html file updated | 9 April 2016 13:23 CEST | Original file | - |
| article xml uploaded. | 9 April 2016 13:22 CEST | Original file | https://www.mdpi.com/1424-8220/16/4/504/xml |
| article pdf uploaded. | 9 April 2016 13:22 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/504/pdf |
