| article html file updated | 11 February 2020 08:05 CET | Update | https://www.mdpi.com/1999-4893/12/1/21 |
| article html file updated | 27 April 2019 08:27 CEST | Update | - |
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| article xml uploaded. | 10 January 2019 16:27 CET | Original file | https://www.mdpi.com/1999-4893/12/1/21/xml |
| article pdf uploaded. | 10 January 2019 16:27 CET | Version of Record | https://www.mdpi.com/1999-4893/12/1/21/pdf |
