| article html file updated | 12 August 2026 21:51 CEST | Update | https://www.mdpi.com/2227-7102/4/1/36 |
| article html file updated | 6 February 2020 06:39 CET | Update | N/A |
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| article pdf uploaded. | 9 January 2014 09:02 CET | Version of Record | https://www.mdpi.com/2227-7102/4/1/36/pdf |
