| article html file updated | 8 February 2020 21:16 CET | Update | https://www.mdpi.com/2079-8954/5/4/51 |
| article html file updated | 2 May 2019 14:49 CEST | Update | - |
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| article xml uploaded. | 15 November 2017 12:14 CET | Original file | https://www.mdpi.com/2079-8954/5/4/51/xml |
| article pdf uploaded. | 15 November 2017 12:14 CET | Version of Record | https://www.mdpi.com/2079-8954/5/4/51/pdf |
