| article html file updated | 8 February 2020 20:00 CET | Update | https://www.mdpi.com/2227-7390/5/4/59 |
| article html file updated | 28 September 2019 03:41 CEST | Update | - |
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| article pdf uploaded. | 1 November 2017 05:26 CET | Version of Record | https://www.mdpi.com/2227-7390/5/4/59/pdf |
