| article html file updated | 5 February 2020 23:41 CET | Update | https://www.mdpi.com/1999-4923/5/1/69 |
| article html file updated | 8 May 2019 10:30 CEST | Update | - |
| article html file updated | 20 March 2019 16:30 CET | Update | - |
| article html file updated | 17 June 2015 05:08 CEST | Update | - |
| article html file updated | 28 April 2014 11:06 CEST | Update | - |
| article xml file uploaded | 28 April 2014 11:06 CEST | Original file | https://www.mdpi.com/1999-4923/5/1/69/xml |
| article html file updated | 8 February 2013 09:20 CET | Update | - |
| article html file updated | 7 February 2013 17:38 CET | Update | - |
| article html file updated | 24 January 2013 11:46 CET | Original file | - |
