| article html file updated | 6 February 2020 18:26 CET | Update | https://www.mdpi.com/1424-8247/8/2/221 |
| article html file updated | 6 May 2019 20:26 CEST | Update | - |
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| article xml file uploaded | 7 July 2015 04:43 CEST | Original file | https://www.mdpi.com/1424-8247/8/2/221/xml |
| article pdf uploaded. | 8 May 2015 10:23 CEST | Version of Record | https://www.mdpi.com/1424-8247/8/2/221/pdf |
