| article html file updated | 6 February 2020 12:17 CET | Update | https://www.mdpi.com/1999-4915/6/9/3438 |
| article html file updated | 7 May 2019 08:13 CEST | Update | N/A |
| article html file updated | 22 March 2019 00:59 CET | Update | N/A |
| article html file updated | 20 August 2015 19:34 CEST | Update | N/A |
| article html file updated | 8 October 2014 08:16 CEST | Original file | N/A |
| article xml file uploaded | 8 October 2014 08:16 CEST | Original file | https://www.mdpi.com/1999-4915/6/9/3438/xml |
| article pdf uploaded. | 17 September 2014 14:35 CEST | Version of Record | https://www.mdpi.com/1999-4915/6/9/3438/pdf |
