| article html file updated | 17 June 2015 06:25 CEST | Update | https://www.mdpi.com/1424-8220/13/2/2220 |
| article html file updated | 30 October 2013 09:52 CET | Update | N/A |
| article xml file uploaded | 30 October 2013 09:51 CET | Update | https://www.mdpi.com/1424-8220/13/2/2220/xml |
| article html file updated | 23 April 2013 15:20 CEST | Update | N/A |
| article xml file uploaded | 23 April 2013 15:20 CEST | Update | N/A |
| article html file updated | 25 March 2013 12:27 CET | Original file | N/A |
| article xml file uploaded | 25 March 2013 12:26 CET | Original file | N/A |
| article pdf uploaded. | 7 February 2013 14:06 CET | Version of Record | https://www.mdpi.com/1424-8220/13/2/2220/pdf |
