| article html file updated | 9 February 2020 02:42 CET | Update | https://www.mdpi.com/2075-1680/7/1/2 |
| article html file updated | 2 May 2019 02:59 CEST | Update | N/A |
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| article html file updated | 11 January 2018 16:12 CET | Original file | N/A |
| article xml uploaded. | 11 January 2018 16:11 CET | Original file | https://www.mdpi.com/2075-1680/7/1/2/xml |
| article pdf uploaded. | 11 January 2018 16:11 CET | Version of Record | https://www.mdpi.com/2075-1680/7/1/2/pdf |
