| article html file updated | 6 February 2020 02:03 CET | Update | https://www.mdpi.com/1424-8247/6/5/681 |
| article html file updated | 8 May 2019 05:15 CEST | Update | - |
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| article xml file uploaded | 13 September 2013 17:19 CEST | Original file | https://www.mdpi.com/1424-8247/6/5/681/xml |
| article pdf uploaded. | 14 May 2013 12:18 CEST | Version of Record | https://www.mdpi.com/1424-8247/6/5/681/pdf |
