| article html file updated | 6 February 2020 02:20 CET | Update | https://www.mdpi.com/1424-8247/6/6/716 |
| article html file updated | 8 May 2019 04:42 CEST | Update | N/A |
| article html file updated | 20 March 2019 23:02 CET | Update | N/A |
| article html file updated | 17 June 2015 09:42 CEST | Update | N/A |
| article html file updated | 13 September 2013 17:19 CEST | Original file | N/A |
| article xml file uploaded | 13 September 2013 17:19 CEST | Original file | https://www.mdpi.com/1424-8247/6/6/716/xml |
| article pdf uploaded. | 27 May 2013 11:12 CEST | Version of Record | https://www.mdpi.com/1424-8247/6/6/716/pdf |
