| article html file updated | 9 February 2020 01:23 CET | Update | https://www.mdpi.com/1999-4915/10/1/9 |
| article html file updated | 29 September 2019 12:49 CEST | Update | - |
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| article html file updated | 28 December 2017 09:46 CET | Original file | - |
| article xml uploaded. | 28 December 2017 09:45 CET | Original file | https://www.mdpi.com/1999-4915/10/1/9/xml |
| article pdf uploaded. | 28 December 2017 09:45 CET | Version of Record | https://www.mdpi.com/1999-4915/10/1/9/pdf |
