| article html file updated | 11 February 2020 11:20 CET | Update | https://www.mdpi.com/2312-7481/5/1/7 |
| article html file updated | 27 April 2019 01:52 CEST | Update | - |
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| article html file updated | 24 January 2019 11:54 CET | Original file | - |
| article xml uploaded. | 24 January 2019 11:53 CET | Original file | https://www.mdpi.com/2312-7481/5/1/7/xml |
| article pdf uploaded. | 24 January 2019 11:53 CET | Version of Record | https://www.mdpi.com/2312-7481/5/1/7/pdf |
