| article html file updated | 11 February 2020 17:30 CET | Update | https://www.mdpi.com/2079-9276/8/1/40 |
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| article xml uploaded. | 20 February 2019 15:59 CET | Original file | https://www.mdpi.com/2079-9276/8/1/40/xml |
| article pdf uploaded. | 20 February 2019 15:59 CET | Version of Record | https://www.mdpi.com/2079-9276/8/1/40/pdf |