| article html file updated | 6 February 2020 02:42 CET | Update | https://www.mdpi.com/1999-4915/5/6/1516 |
| article html file updated | 8 May 2019 03:55 CEST | Update | - |
| article html file updated | 20 March 2019 23:58 CET | Update | - |
| article html file updated | 17 June 2015 10:22 CEST | Update | - |
| article html file updated | 6 August 2013 16:12 CEST | Original file | - |
| article xml file uploaded | 6 August 2013 16:12 CEST | Original file | https://www.mdpi.com/1999-4915/5/6/1516/xml |
| article pdf uploaded. | 19 June 2013 10:41 CEST | Version of Record | https://www.mdpi.com/1999-4915/5/6/1516/pdf |
