| article html file updated | 7 February 2020 06:35 CET | Update | https://new.mdpi.com/1996-1944/9/4/253 |
| article html file updated | 5 May 2019 20:03 CEST | Update | - |
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| article xml uploaded. | 30 March 2016 08:14 CEST | Update | https://new.mdpi.com/1996-1944/9/4/253/xml |
| article pdf uploaded. | 30 March 2016 08:14 CEST | Version of Record | https://new.mdpi.com/1996-1944/9/4/253/pdf |
