| article html file updated | 12 February 2020 00:11 CET | Update | https://www.mdpi.com/1424-8220/19/6/1421 |
| article html file updated | 17 October 2019 01:28 CEST | Update | - |
| article html file updated | 25 April 2019 22:58 CEST | Update | - |
| article html file updated | 11 April 2019 18:04 CEST | Update | - |
| article html file updated | 10 April 2019 11:56 CEST | Update | - |
| article html file updated | 4 April 2019 18:24 CEST | Update | - |
| article html file updated | 22 March 2019 11:50 CET | Original file | - |
| article pdf uploaded. | 22 March 2019 11:49 CET | Version of Record | https://www.mdpi.com/1424-8220/19/6/1421/pdf |
| article xml uploaded. | 22 March 2019 11:49 CET | Update | https://www.mdpi.com/1424-8220/19/6/1421/xml |
| article xml file uploaded | 22 March 2019 11:49 CET | Original file | - |
