| article html file updated | 6 February 2020 07:04 CET | Update | https://www.mdpi.com/1999-4923/6/1/26 |
| article html file updated | 7 May 2019 19:02 CEST | Update | N/A |
| article html file updated | 21 March 2019 11:53 CET | Update | N/A |
| article html file updated | 19 August 2015 19:26 CEST | Update | N/A |
| article html file updated | 28 April 2014 11:06 CEST | Original file | N/A |
| article xml file uploaded | 28 April 2014 11:06 CEST | Original file | https://www.mdpi.com/1999-4923/6/1/26/xml |
| article pdf uploaded. | 29 January 2014 13:37 CET | Version of Record | https://www.mdpi.com/1999-4923/6/1/26/pdf |
