| article html file updated | 6 February 2020 14:46 CET | Update | https://www.mdpi.com/1996-1944/8/1/57 |
| article html file updated | 7 May 2019 03:20 CEST | Update | - |
| article html file updated | 25 March 2019 19:48 CET | Update | - |
| article html file updated | 21 August 2015 04:52 CEST | Update | - |
| article html file updated | 22 January 2015 10:32 CET | Original file | - |
| article xml file uploaded | 22 January 2015 10:32 CET | Original file | https://www.mdpi.com/1996-1944/8/1/57/xml |
| article pdf uploaded. | 16 January 2015 09:23 CET | Updated version of record | https://www.mdpi.com/1996-1944/8/1/57/pdf |
| article pdf uploaded. | 25 December 2014 07:48 CET | Version of Record | https://www.mdpi.com/1996-1944/8/1/57/pdf-vor |
