| article html file updated | 6 February 2020 11:12 CET | Update | https://www.mdpi.com/2218-1989/4/3/612 |
| article html file updated | 7 May 2019 10:33 CEST | Update | - |
| article html file updated | 21 March 2019 22:19 CET | Update | - |
| article html file updated | 20 August 2015 14:24 CEST | Update | - |
| article html file updated | 11 October 2014 03:20 CEST | Update | - |
| article xml file uploaded | 11 October 2014 03:20 CEST | Update | https://www.mdpi.com/2218-1989/4/3/612/xml |
| article pdf uploaded. | 6 August 2014 09:35 CEST | Updated version of record | https://www.mdpi.com/2218-1989/4/3/612/pdf |
| article html file updated | 5 August 2014 11:59 CEST | Original file | - |
| article xml file uploaded | 5 August 2014 11:59 CEST | Original file | - |
| article pdf uploaded. | 4 August 2014 13:51 CEST | Version of Record | https://www.mdpi.com/2218-1989/4/3/612/pdf-vor |
