| article html file updated | 6 February 2020 22:14 CET | Update | https://www.mdpi.com/1424-8220/15/9/21500 |
| article html file updated | 6 May 2019 12:31 CEST | Update | - |
| article html file updated | 26 March 2019 09:39 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/1424-8220/15/9/21500/xml |
| article html file updated | 3 September 2015 07:44 CEST | Original file | - |
| article xml file uploaded | 3 September 2015 07:44 CEST | Original file | - |
| article pdf uploaded. | 28 August 2015 12:18 CEST | Version of Record | https://www.mdpi.com/1424-8220/15/9/21500/pdf |
