| article html file updated | 7 February 2020 09:19 CET | Update | https://www.mdpi.com/2073-8994/8/6/40 |
| article html file updated | 5 May 2019 14:36 CEST | Update | - |
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| article html file updated | 1 July 2016 10:19 CEST | Update | - |
| article html file updated | 26 May 2016 11:18 CEST | Original file | - |
| article xml uploaded. | 26 May 2016 11:17 CEST | Update | https://www.mdpi.com/2073-8994/8/6/40/xml |
| article pdf uploaded. | 26 May 2016 11:17 CEST | Version of Record | https://www.mdpi.com/2073-8994/8/6/40/pdf |
