| article html file updated | 9 February 2020 01:16 CET | Update | https://www.mdpi.com/1424-8220/18/1/44 |
| article html file updated | 29 September 2019 12:00 CEST | Update | - |
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| article html file updated | 2 February 2018 10:22 CET | Update | - |
| article html file updated | 26 December 2017 12:09 CET | Original file | - |
| article xml uploaded. | 26 December 2017 12:07 CET | Original file | https://www.mdpi.com/1424-8220/18/1/44/xml |
| article pdf uploaded. | 26 December 2017 12:07 CET | Version of Record | https://www.mdpi.com/1424-8220/18/1/44/pdf |
