| article html file updated | 7 February 2020 08:12 CET | Update | https://www.mdpi.com/2227-9032/4/2/24 |
| article html file updated | 21 September 2019 16:30 CEST | Update | N/A |
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| article pdf uploaded. | 5 May 2016 08:12 CEST | Version of Record | https://www.mdpi.com/2227-9032/4/2/24/pdf |
