| article html file updated | 6 February 2020 22:17 CET | Update | https://www.mdpi.com/1424-8220/15/9/21824 |
| article html file updated | 6 May 2019 12:25 CEST | Update | - |
| article html file updated | 26 March 2019 09:45 CET | Update | - |
| article html file updated | 9 October 2015 11:58 CEST | Update | - |
| article xml file uploaded | 9 October 2015 11:58 CEST | Update | https://www.mdpi.com/1424-8220/15/9/21824/xml |
| article html file updated | 22 September 2015 12:00 CEST | Original file | - |
| article xml file uploaded | 22 September 2015 12:00 CEST | Original file | - |
| article pdf uploaded. | 2 September 2015 05:17 CEST | Updated version of record | https://www.mdpi.com/1424-8220/15/9/21824/pdf |
| article pdf uploaded. | 31 August 2015 09:55 CEST | Version of Record | https://www.mdpi.com/1424-8220/15/9/21824/pdf-vor |
