| article html file updated | 9 February 2020 00:48 CET | Update | https://www.mdpi.com/1424-8220/18/1/3 |
| article html file updated | 29 September 2019 09:24 CEST | Update | - |
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| article html file updated | 2 February 2018 09:19 CET | Update | - |
| article html file updated | 21 December 2017 14:54 CET | Original file | - |
| article xml uploaded. | 21 December 2017 14:52 CET | Original file | https://www.mdpi.com/1424-8220/18/1/3/xml |
| article pdf uploaded. | 21 December 2017 14:52 CET | Version of Record | https://www.mdpi.com/1424-8220/18/1/3/pdf |
