| article html file updated | 9 February 2020 06:20 CET | Update | https://new.mdpi.com/2227-9717/6/2/17 |
| article html file updated | 30 September 2019 17:37 CEST | Update | - |
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| article html file updated | 11 February 2018 13:09 CET | Original file | - |
| article xml uploaded. | 11 February 2018 13:08 CET | Update | https://new.mdpi.com/2227-9717/6/2/17/xml |
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| article pdf uploaded. | 11 February 2018 13:08 CET | Version of Record | https://new.mdpi.com/2227-9717/6/2/17/pdf |
