| article html file updated | 6 February 2020 05:38 CET | Update | https://www.mdpi.com/2071-1050/5/11/4949 |
| article html file updated | 7 May 2019 21:55 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:54 CET | Update | N/A |
| article html file updated | 19 August 2015 10:04 CEST | Original file | N/A |
| article pdf uploaded. | 19 November 2013 15:23 CET | Version of Record | https://www.mdpi.com/2071-1050/5/11/4949/pdf |
