| article html file updated | 6 February 2020 03:37 CET | Update | https://www.mdpi.com/1999-4893/6/3/442 |
| article html file updated | 8 May 2019 02:04 CEST | Update | - |
| article html file updated | 21 March 2019 02:29 CET | Update | - |
| article html file updated | 17 December 2016 07:50 CET | Original file | - |
| article pdf uploaded. | 6 August 2013 10:54 CEST | Version of Record | https://www.mdpi.com/1999-4893/6/3/442/pdf |
