| article html file updated | 5 February 2020 21:52 CET | Update | https://www.mdpi.com/2077-0375/2/3/665 |
| article html file updated | 8 May 2019 15:01 CEST | Update | - |
| article html file updated | 20 March 2019 12:12 CET | Update | - |
| article html file updated | 17 June 2015 02:08 CEST | Update | - |
| article html file updated | 18 March 2014 09:50 CET | Update | - |
| article xml file uploaded | 18 March 2014 09:50 CET | Original file | https://www.mdpi.com/2077-0375/2/3/665/xml |
| article html file updated | 7 February 2013 14:50 CET | Update | - |
| article html file updated | 7 February 2013 05:53 CET | Update | - |
| article html file updated | 6 February 2013 10:10 CET | Update | - |
| article html file updated | 29 January 2013 06:26 CET | Update | - |
| article html file updated | 24 January 2013 01:30 CET | Original file | - |
