| article html file updated | 8 January 2020 20:17 CET | Update | https://www.mdpi.com/1424-8220/13/1/1076 | 
| article html file updated | 19 September 2019 17:03 CEST | Update | - | 
| article html file updated | 9 March 2017 10:50 CET | Update | - | 
| article html file updated | 17 June 2015 05:32 CEST | Update | - | 
| article html file updated | 30 October 2013 09:20 CET | Update | - | 
| article xml file uploaded | 30 October 2013 09:20 CET | Update | https://www.mdpi.com/1424-8220/13/1/1076/xml | 
| article html file updated | 23 April 2013 14:51 CEST | Update | - | 
| article xml file uploaded | 23 April 2013 14:51 CEST | Update | - | 
| article html file updated | 26 March 2013 10:54 CET | Update | - | 
| article xml file uploaded | 26 March 2013 10:54 CET | Update | - | 
| article html file updated | 5 March 2013 16:41 CET | Update | - | 
| article xml file uploaded | 5 March 2013 16:41 CET | Update | - | 
| article html file updated | 22 February 2013 08:31 CET | Original file | - | 
| article xml file uploaded | 22 February 2013 08:31 CET | Original file | - | 
| article pdf uploaded. | 18 January 2013 13:56 CET | Version of Record | https://www.mdpi.com/1424-8220/13/1/1076/pdf |