| article html file updated | 9 February 2020 01:04 CET | Update | https://www.mdpi.com/2079-4991/8/1/4 |
| article html file updated | 29 September 2019 10:57 CEST | Update | N/A |
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| article html file updated | 23 December 2017 14:13 CET | Original file | N/A |
| article xml uploaded. | 23 December 2017 14:11 CET | Original file | https://www.mdpi.com/2079-4991/8/1/4/xml |
| article pdf uploaded. | 23 December 2017 14:11 CET | Version of Record | https://www.mdpi.com/2079-4991/8/1/4/pdf |
