| article html file updated | 13 August 2026 14:55 CEST | Update | https://www.mdpi.com/1999-5903/7/1/50 |
| article html file updated | 6 February 2020 16:15 CET | Update | N/A |
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| article pdf uploaded. | 2 March 2015 12:18 CET | Version of Record | https://www.mdpi.com/1999-5903/7/1/50/pdf |
