| article html file updated | 6 February 2020 06:51 CET | Update | https://www.mdpi.com/2071-1050/6/1/436 |
| article html file updated | 20 September 2019 05:22 CEST | Update | - |
| article html file updated | 7 May 2019 19:33 CEST | Update | - |
| article html file updated | 21 March 2019 11:19 CET | Update | - |
| article html file updated | 19 August 2015 18:17 CEST | Original file | - |
| article pdf uploaded. | 22 January 2014 17:04 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/1/436/pdf |
| article pdf uploaded. | 21 January 2014 14:49 CET | Version of Record | https://www.mdpi.com/2071-1050/6/1/436/pdf-vor |
