| article html file updated | 8 February 2020 06:15 CET | Update | https://www.mdpi.com/2079-9292/6/2/40 |
| article html file updated | 24 September 2019 21:59 CEST | Update | - |
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| article html file updated | 19 May 2017 11:38 CEST | Original file | - |
| article xml uploaded. | 19 May 2017 11:37 CEST | Original file | https://www.mdpi.com/2079-9292/6/2/40/xml |
| article pdf uploaded. | 19 May 2017 11:37 CEST | Version of Record | https://www.mdpi.com/2079-9292/6/2/40/pdf |
