| article html file updated | 13 August 2026 22:55 CEST | Update | https://www.mdpi.com/2079-7737/4/2/424 |
| article html file updated | 6 February 2020 19:39 CET | Update | N/A |
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| article pdf uploaded. | 12 June 2015 14:06 CEST | Version of Record | https://www.mdpi.com/2079-7737/4/2/424/pdf |
