| article html file updated | 6 February 2020 04:49 CET | Update | https://www.mdpi.com/2075-5309/3/4/689 |
| article html file updated | 7 May 2019 23:30 CEST | Update | - |
| article html file updated | 21 March 2019 05:44 CET | Update | - |
| article html file updated | 17 June 2015 13:46 CEST | Original file | - |
| article pdf uploaded. | 18 October 2013 17:02 CEST | Updated version of record | https://www.mdpi.com/2075-5309/3/4/689/pdf |
| article pdf uploaded. | 15 October 2013 18:18 CEST | Updated version of record | https://www.mdpi.com/2075-5309/3/4/689/pdf-vor |
| article pdf uploaded. | 11 October 2013 16:16 CEST | Version of Record | https://www.mdpi.com/2075-5309/3/4/689/pdf-vor |
