| article html file updated | 7 February 2020 09:29 CET | Update | https://www.mdpi.com/1996-1073/9/6/423 |
| article html file updated | 5 May 2019 14:15 CEST | Update | - |
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| article xml uploaded. | 30 May 2016 11:41 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/423/xml |
| article pdf uploaded. | 30 May 2016 11:41 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/423/pdf |