| article html file updated | 7 February 2020 08:26 CET | Update | https://www.mdpi.com/2227-9067/3/2/8 |
| article html file updated | 21 September 2019 16:48 CEST | Update | N/A |
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| article xml uploaded. | 10 May 2016 11:22 CEST | Original file | https://www.mdpi.com/2227-9067/3/2/8/xml |
| article pdf uploaded. | 10 May 2016 11:22 CEST | Version of Record | https://www.mdpi.com/2227-9067/3/2/8/pdf |
