| article html file updated | 9 February 2020 00:49 CET | Update | https://www.mdpi.com/1424-8220/18/1/8 |
| article html file updated | 29 September 2019 09:35 CEST | Update | - |
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| article html file updated | 21 December 2017 16:59 CET | Original file | - |
| article xml uploaded. | 21 December 2017 16:57 CET | Original file | https://www.mdpi.com/1424-8220/18/1/8/xml |
| article pdf uploaded. | 21 December 2017 16:57 CET | Version of Record | https://www.mdpi.com/1424-8220/18/1/8/pdf |
