| article html file updated | 6 February 2020 05:31 CET | Update | https://www.mdpi.com/2073-4395/3/4/747 |
| article html file updated | 21 March 2019 07:35 CET | Update | - |
| article html file updated | 19 August 2015 09:37 CEST | Original file | - |
| article pdf uploaded. | 14 November 2013 16:15 CET | Updated version of record | https://www.mdpi.com/2073-4395/3/4/747/pdf |
| article pdf uploaded. | 13 November 2013 15:27 CET | Version of Record | https://www.mdpi.com/2073-4395/3/4/747/pdf-vor |
