| article html file updated | 6 February 2020 12:51 CET | Update | https://www.mdpi.com/2073-4433/5/4/699 |
| article html file updated | 22 March 2019 02:39 CET | Update | - |
| article html file updated | 20 August 2015 23:14 CEST | Original file | - |
| article pdf uploaded. | 16 October 2014 09:42 CEST | Updated version of record | https://www.mdpi.com/2073-4433/5/4/699/pdf |
| article pdf uploaded. | 15 October 2014 15:21 CEST | Version of Record | https://www.mdpi.com/2073-4433/5/4/699/pdf-vor |
