| article html file updated | 6 February 2020 03:32 CET | Update | https://www.mdpi.com/2071-1050/5/8/3224 |
| article html file updated | 8 May 2019 02:16 CEST | Update | - |
| article html file updated | 21 March 2019 02:14 CET | Update | - |
| article html file updated | 17 June 2015 11:53 CEST | Update | - |
| article html file updated | 14 November 2014 11:02 CET | Original file | - |
| article xml file uploaded | 14 November 2014 11:02 CET | Original file | https://www.mdpi.com/2071-1050/5/8/3224/xml |
| article pdf uploaded. | 31 July 2013 10:21 CEST | Updated version of record | https://www.mdpi.com/2071-1050/5/8/3224/pdf |
