| article html file updated | 7 February 2020 09:25 CET | Update | https://www.mdpi.com/2073-4360/8/6/206 |
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| article xml uploaded. | 27 May 2016 13:43 CEST | Update | https://www.mdpi.com/2073-4360/8/6/206/xml |
| article pdf uploaded. | 27 May 2016 13:43 CEST | Version of Record | https://www.mdpi.com/2073-4360/8/6/206/pdf |
