| article html file updated | 7 February 2020 00:26 CET | Update | https://www.mdpi.com/2073-4395/5/4/519 |
| article html file updated | 6 May 2019 08:00 CEST | Update | - |
| article html file updated | 26 March 2019 13:48 CET | Update | - |
| article html file updated | 2 November 2015 10:51 CET | Original file | - |
| article xml file uploaded | 2 November 2015 10:51 CET | Original file | https://www.mdpi.com/2073-4395/5/4/519/xml |
| article pdf uploaded. | 2 November 2015 09:45 CET | Updated version of record | https://www.mdpi.com/2073-4395/5/4/519/pdf |
| article pdf uploaded. | 30 October 2015 16:31 CET | Version of Record | https://www.mdpi.com/2073-4395/5/4/519/pdf-vor |
