| article html file updated | 6 February 2020 00:04 CET | Update | https://www.mdpi.com/2073-4344/3/1/27 |
| article html file updated | 8 May 2019 09:38 CEST | Update | N/A |
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| article pdf uploaded. | 18 January 2013 10:49 CET | Version of Record | https://www.mdpi.com/2073-4344/3/1/27/pdf |
