| article html file updated | 7 February 2020 13:55 CET | Update | https://new.mdpi.com/2227-9032/4/3/62 |
| article html file updated | 5 May 2019 06:01 CEST | Update | - |
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| article pdf uploaded. | 26 August 2016 08:42 CEST | Version of Record | https://new.mdpi.com/2227-9032/4/3/62/pdf |
