| article html file updated | 9 February 2020 04:20 CET | Update | https://www.mdpi.com/2079-9292/7/2/12 |
| article html file updated | 30 September 2019 05:24 CEST | Update | N/A |
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| article html file updated | 25 January 2018 15:58 CET | Original file | N/A |
| article xml uploaded. | 25 January 2018 15:57 CET | Update | https://www.mdpi.com/2079-9292/7/2/12/xml |
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| article pdf uploaded. | 25 January 2018 15:57 CET | Version of Record | https://www.mdpi.com/2079-9292/7/2/12/pdf |