| article html file updated | 5 February 2020 23:23 CET | Update | https://www.mdpi.com/2073-4433/3/4/573 |
| article html file updated | 8 May 2019 11:10 CEST | Update | - |
| article html file updated | 20 March 2019 15:51 CET | Update | - |
| article html file updated | 17 June 2015 04:46 CEST | Update | - |
| article html file updated | 14 August 2014 11:40 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:40 CEST | Update | https://www.mdpi.com/2073-4433/3/4/573/xml |
| article html file updated | 14 August 2014 11:20 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:20 CEST | Original file | - |
| article html file updated | 7 February 2013 17:23 CET | Update | - |
| article html file updated | 24 January 2013 10:59 CET | Original file | - |
