| article html file updated | 6 February 2020 04:27 CET | Update | https://www.mdpi.com/1999-4915/5/9/2272 |
| article html file updated | 8 May 2019 00:17 CEST | Update | - |
| article html file updated | 21 March 2019 04:45 CET | Update | - |
| article html file updated | 17 June 2015 13:21 CEST | Update | - |
| article html file updated | 25 October 2013 11:14 CEST | Original file | - |
| article xml file uploaded | 25 October 2013 11:14 CEST | Original file | https://www.mdpi.com/1999-4915/5/9/2272/xml |
| article pdf uploaded. | 23 September 2013 14:43 CEST | Updated version of record | https://www.mdpi.com/1999-4915/5/9/2272/pdf |
| article pdf uploaded. | 19 September 2013 10:10 CEST | Version of Record | https://www.mdpi.com/1999-4915/5/9/2272/pdf-vor |
