| article html file updated | 12 August 2026 22:07 CEST | Update | https://www.mdpi.com/1999-4915/6/2/391 |
| article html file updated | 6 February 2020 06:57 CET | Update | N/A |
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| article pdf uploaded. | 27 January 2014 11:36 CET | Version of Record | https://www.mdpi.com/1999-4915/6/2/391/pdf |
