| article html file updated | 11 February 2020 09:43 CET | Update | https://www.mdpi.com/2313-7673/4/1/6 |
| article html file updated | 27 April 2019 04:58 CEST | Update | - |
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| article xml uploaded. | 17 January 2019 12:05 CET | Original file | https://www.mdpi.com/2313-7673/4/1/6/xml |
| article pdf uploaded. | 17 January 2019 12:05 CET | Version of Record | https://www.mdpi.com/2313-7673/4/1/6/pdf |
