| article html file updated | 11 February 2020 02:26 CET | Update | https://www.mdpi.com/2227-7099/6/4/66 |
| article html file updated | 11 October 2019 18:33 CEST | Update | - |
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| article html file updated | 26 December 2018 05:49 CET | Update | - |
| article html file updated | 11 December 2018 06:53 CET | Original file | - |
| article pdf uploaded. | 11 December 2018 06:52 CET | Version of Record | https://www.mdpi.com/2227-7099/6/4/66/pdf |
| article xml uploaded. | 11 December 2018 06:52 CET | Update | https://www.mdpi.com/2227-7099/6/4/66/xml |
| article xml file uploaded | 11 December 2018 06:52 CET | Original file | - |
