| article html file updated | 6 February 2020 12:51 CET | Update | https://www.mdpi.com/1424-2818/6/4/652 |
| article html file updated | 7 May 2019 07:03 CEST | Update | - |
| article html file updated | 22 March 2019 02:40 CET | Update | - |
| article html file updated | 20 August 2015 23:16 CEST | Update | - |
| article html file updated | 22 October 2014 11:21 CEST | Update | - |
| article xml file uploaded | 22 October 2014 11:21 CEST | Update | https://www.mdpi.com/1424-2818/6/4/652/xml |
| article html file updated | 22 October 2014 04:01 CEST | Original file | - |
| article xml file uploaded | 22 October 2014 04:01 CEST | Original file | - |
| article pdf uploaded. | 15 October 2014 16:04 CEST | Version of Record | https://www.mdpi.com/1424-2818/6/4/652/pdf |
