| article html file updated | 6 February 2020 03:56 CET | Update | https://www.mdpi.com/1999-4923/5/3/434 |
| article html file updated | 8 May 2019 01:24 CEST | Update | - |
| article html file updated | 21 March 2019 03:25 CET | Update | - |
| article html file updated | 17 June 2015 12:34 CEST | Update | - |
| article html file updated | 22 November 2013 11:34 CET | Original file | - |
| article xml file uploaded | 22 November 2013 11:34 CET | Original file | https://www.mdpi.com/1999-4923/5/3/434/xml |
| article pdf uploaded. | 21 August 2013 17:15 CEST | Version of Record | https://www.mdpi.com/1999-4923/5/3/434/pdf |
