| article html file updated | 7 February 2020 21:46 CET | Update | https://www.mdpi.com/2072-666X/8/1/6 |
| article html file updated | 22 September 2019 23:04 CEST | Update | N/A |
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| article pdf uploaded. | 19 January 2017 08:52 CET | Version of Record | https://www.mdpi.com/2072-666X/8/1/6/pdf |
