| article html file updated | 9 February 2020 06:09 CET | Update | https://www.mdpi.com/2079-9292/7/2/20 |
| article html file updated | 30 September 2019 16:29 CEST | Update | - |
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| article html file updated | 9 February 2018 17:29 CET | Original file | - |
| article xml uploaded. | 9 February 2018 17:27 CET | Update | https://www.mdpi.com/2079-9292/7/2/20/xml |
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| article pdf uploaded. | 9 February 2018 17:27 CET | Version of Record | https://www.mdpi.com/2079-9292/7/2/20/pdf |
