| article html file updated | 29 August 2025 21:14 CEST | Update | https://www.mdpi.com/1996-1944/7/9/6502 |
| article html file updated | 15 July 2022 23:23 CEST | Update | - |
| article html file updated | 6 February 2020 12:10 CET | Update | - |
| article html file updated | 7 May 2019 08:26 CEST | Update | - |
| article html file updated | 22 March 2019 00:44 CET | Update | - |
| article html file updated | 20 August 2015 18:45 CEST | Update | - |
| article html file updated | 21 October 2014 06:30 CEST | Original file | - |
| article xml file uploaded | 21 October 2014 06:30 CEST | Original file | https://www.mdpi.com/1996-1944/7/9/6502/xml |
| article pdf uploaded. | 15 September 2014 09:16 CEST | Updated version of record | https://www.mdpi.com/1996-1944/7/9/6502/pdf |
| article pdf uploaded. | 12 September 2014 09:58 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/9/6502/pdf-vor |
