| article html file updated | 8 February 2020 21:49 CET | Update | https://www.mdpi.com/2075-1729/7/4/46 |
| article html file updated | 28 September 2019 15:35 CEST | Update | - |
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| article html file updated | 21 November 2017 13:31 CET | Original file | - |
| article xml uploaded. | 21 November 2017 13:30 CET | Original file | https://www.mdpi.com/2075-1729/7/4/46/xml |
| article pdf uploaded. | 21 November 2017 13:30 CET | Version of Record | https://www.mdpi.com/2075-1729/7/4/46/pdf |
