| article html file updated | 6 February 2020 04:26 CET | Update | https://www.mdpi.com/1999-4923/5/3/472 |
| article html file updated | 8 May 2019 00:20 CEST | Update | - |
| article html file updated | 21 March 2019 04:42 CET | Update | - |
| article html file updated | 17 June 2015 13:19 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/1999-4923/5/3/472/xml |
| article pdf uploaded. | 18 September 2013 10:32 CEST | Version of Record | https://www.mdpi.com/1999-4923/5/3/472/pdf |
