| article html file updated | 6 February 2020 03:36 CET | Update | https://www.mdpi.com/2227-9091/1/2/45 |
| article html file updated | 19 September 2019 23:36 CEST | Update | - |
| article html file updated | 8 May 2019 02:07 CEST | Update | - |
| article html file updated | 21 March 2019 02:25 CET | Update | - |
| article html file updated | 19 December 2016 11:44 CET | Update | - |
| article html file updated | 24 November 2016 04:28 CET | Original file | - |
| article pdf uploaded. | 6 August 2013 09:49 CEST | Updated version of record | https://www.mdpi.com/2227-9091/1/2/45/pdf |
| article pdf uploaded. | 5 August 2013 10:46 CEST | Version of Record | https://www.mdpi.com/2227-9091/1/2/45/pdf-vor |
