| article html file updated | 29 August 2025 20:57 CEST | Update | https://www.mdpi.com/1999-4915/6/2/640 |
| article html file updated | 20 August 2025 21:54 CEST | Update | - |
| article html file updated | 6 February 2020 07:09 CET | Update | - |
| article html file updated | 7 May 2019 18:53 CEST | Update | - |
| article html file updated | 21 March 2019 12:04 CET | Update | - |
| article html file updated | 19 August 2015 19:46 CEST | Update | - |
| article html file updated | 18 March 2014 10:01 CET | Original file | - |
| article xml file uploaded | 18 March 2014 10:01 CET | Original file | https://www.mdpi.com/1999-4915/6/2/640/xml |
| article pdf uploaded. | 7 February 2014 12:01 CET | Version of Record | https://www.mdpi.com/1999-4915/6/2/640/pdf |
