| article html file updated | 6 February 2020 07:54 CET | Update | https://www.mdpi.com/1999-4923/6/1/80 |
| article html file updated | 7 May 2019 17:19 CEST | Update | - |
| article html file updated | 21 March 2019 13:52 CET | Update | - |
| article html file updated | 19 August 2015 23:43 CEST | Update | - |
| article html file updated | 28 April 2014 11:07 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 11:06 CEST | Original file | https://www.mdpi.com/1999-4923/6/1/80/xml |
| article pdf uploaded. | 14 March 2014 08:36 CET | Version of Record | https://www.mdpi.com/1999-4923/6/1/80/pdf |
