| article html file updated | 12 August 2026 20:52 CEST | Update | https://www.mdpi.com/2076-3921/2/4/309 |
| article html file updated | 6 February 2020 05:21 CET | Update | N/A |
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| article pdf uploaded. | 5 November 2013 10:51 CET | Version of Record | https://www.mdpi.com/2076-3921/2/4/309/pdf |
