| article html file updated | 6 February 2020 08:40 CET | Update | https://www.mdpi.com/2076-3905/3/2/137 |
| article html file updated | 21 March 2019 15:41 CET | Update | - |
| article html file updated | 11 July 2016 10:00 CEST | Update | - |
| article html file updated | 20 August 2015 03:36 CEST | Original file | - |
| article pdf uploaded. | 23 April 2014 09:25 CEST | Updated version of record | https://www.mdpi.com/2076-3905/3/2/137/pdf |
| article pdf uploaded. | 17 April 2014 10:03 CEST | Version of Record | https://www.mdpi.com/2076-3905/3/2/137/pdf-vor |
