| article html file updated | 6 February 2020 09:09 CET | Update | https://www.mdpi.com/2218-1989/4/2/319 |
| article html file updated | 7 May 2019 14:45 CEST | Update | - |
| article html file updated | 21 March 2019 16:49 CET | Update | - |
| article html file updated | 20 August 2015 06:23 CEST | Update | - |
| article html file updated | 18 July 2014 03:58 CEST | Original file | - |
| article xml file uploaded | 18 July 2014 03:58 CEST | Original file | https://www.mdpi.com/2218-1989/4/2/319/xml |
| article pdf uploaded. | 13 May 2014 11:46 CEST | Updated version of record | https://www.mdpi.com/2218-1989/4/2/319/pdf |
| article pdf uploaded. | 9 May 2014 13:34 CEST | Version of Record | https://www.mdpi.com/2218-1989/4/2/319/pdf-vor |
