| article html file updated | 11 February 2020 05:47 CET | Update | https://www.mdpi.com/2227-7102/9/1/6 |
| article html file updated | 12 October 2019 15:25 CEST | Update | - |
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| article html file updated | 29 December 2018 07:18 CET | Original file | - |
| article pdf uploaded. | 29 December 2018 07:16 CET | Version of Record | https://www.mdpi.com/2227-7102/9/1/6/pdf |
| article xml uploaded. | 29 December 2018 07:16 CET | Update | https://www.mdpi.com/2227-7102/9/1/6/xml |
| article xml file uploaded | 29 December 2018 07:16 CET | Original file | - |
