| article html file updated | 28 September 2025 19:15 CEST | Update | https://www.mdpi.com/1999-4915/5/1/241 |
| article html file updated | 29 August 2025 20:32 CEST | Update | - |
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| article html file updated | 5 February 2013 12:58 CET | Update | - |
| article xml file uploaded | 5 February 2013 12:58 CET | Original file | https://www.mdpi.com/1999-4915/5/1/241/xml |
| article html file updated | 24 January 2013 12:27 CET | Original file | - |
| article pdf uploaded. | 24 January 2013 09:41 CET | Updated version of record | https://www.mdpi.com/1999-4915/5/1/241/pdf |
| article pdf uploaded. | 17 January 2013 15:12 CET | Version of Record | https://www.mdpi.com/1999-4915/5/1/241/pdf-vor |
