| article html file updated | 16 June 2015 20:07 CEST | Update | https://www.mdpi.com/2077-0375/1/4/345 |
| article html file updated | 12 May 2014 15:42 CEST | Update | N/A |
| article xml file uploaded | 12 May 2014 15:42 CEST | Original file | https://www.mdpi.com/2077-0375/1/4/345/xml |
| article html file updated | 6 February 2013 23:35 CET | Update | N/A |
| article html file updated | 6 February 2013 04:04 CET | Update | N/A |
| article html file updated | 29 January 2013 00:40 CET | Update | N/A |
| article html file updated | 26 January 2013 06:23 CET | Update | N/A |
| article html file updated | 23 January 2013 02:40 CET | Original file | N/A |
