| article html file updated | 6 February 2020 04:11 CET | Update | https://www.mdpi.com/1999-4915/5/9/2106 |
| article html file updated | 8 May 2019 00:51 CEST | Update | - |
| article html file updated | 21 March 2019 04:07 CET | Update | - |
| article html file updated | 17 June 2015 12:55 CEST | Update | - |
| article html file updated | 25 October 2013 11:05 CEST | Original file | - |
| article xml file uploaded | 25 October 2013 11:05 CEST | Original file | https://www.mdpi.com/1999-4915/5/9/2106/xml |
| article pdf uploaded. | 4 September 2013 15:37 CEST | Version of Record | https://www.mdpi.com/1999-4915/5/9/2106/pdf |
