| article html file updated | 6 February 2020 05:05 CET | Update | https://www.mdpi.com/2223-7747/2/4/676 |
| article html file updated | 7 May 2019 22:57 CEST | Update | - |
| article html file updated | 21 March 2019 06:28 CET | Update | - |
| article html file updated | 17 June 2015 14:11 CEST | Original file | - |
| article pdf uploaded. | 23 October 2013 11:13 CEST | Updated version of record | https://www.mdpi.com/2223-7747/2/4/676/pdf |
| article supplementary file uploaded. | 23 October 2013 10:57 CEST | - | https://www.mdpi.com/2223-7747/2/4/676#supplementary |
| article pdf uploaded. | 23 October 2013 10:55 CEST | Version of Record | https://www.mdpi.com/2223-7747/2/4/676/pdf-vor |
