| article html file updated | 28 September 2025 19:18 CEST | Update | https://www.mdpi.com/2218-1989/3/2/243 |
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| article xml file uploaded | 7 January 2014 12:29 CET | Original file | https://www.mdpi.com/2218-1989/3/2/243/xml |
| article pdf uploaded. | 15 April 2013 17:10 CEST | Updated version of record | https://www.mdpi.com/2218-1989/3/2/243/pdf |
| article pdf uploaded. | 9 April 2013 14:24 CEST | Version of Record | https://www.mdpi.com/2218-1989/3/2/243/pdf-vor |
