| article html file updated | 9 February 2020 11:22 CET | Update | https://www.mdpi.com/2075-4701/8/4/215 |
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| article xml uploaded. | 27 March 2018 05:48 CEST | Update | https://www.mdpi.com/2075-4701/8/4/215/xml |
| article pdf uploaded. | 27 March 2018 05:48 CEST | Version of Record | https://www.mdpi.com/2075-4701/8/4/215/pdf |