| article html file updated | 7 February 2020 08:01 CET | Update | https://www.mdpi.com/2218-2004/4/2/16 |
| article html file updated | 5 May 2019 17:06 CEST | Update | N/A |
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| article html file updated | 1 July 2016 10:02 CEST | Update | N/A |
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| article html file updated | 3 May 2016 10:24 CEST | Original file | N/A |
| article xml uploaded. | 3 May 2016 10:23 CEST | Original file | https://www.mdpi.com/2218-2004/4/2/16/xml |
