| article html file updated | 6 February 2020 00:19 CET | Update | https://www.mdpi.com/2073-8994/5/1/81 |
| article html file updated | 19 September 2019 17:33 CEST | Update | - |
| article html file updated | 8 May 2019 09:02 CEST | Update | - |
| article html file updated | 20 March 2019 18:02 CET | Update | - |
| article html file updated | 19 December 2016 11:45 CET | Original file | - |
| article pdf uploaded. | 31 January 2013 14:24 CET | Updated version of record | https://www.mdpi.com/2073-8994/5/1/81/pdf |
| article pdf uploaded. | 31 January 2013 10:20 CET | Version of Record | https://www.mdpi.com/2073-8994/5/1/81/pdf-vor |
