| article html file updated | 8 February 2020 21:27 CET | Update | https://www.mdpi.com/1999-5903/9/4/86 |
| article html file updated | 28 September 2019 13:15 CEST | Update | N/A |
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| article html file updated | 17 November 2017 10:34 CET | Original file | N/A |
| article xml uploaded. | 17 November 2017 10:33 CET | Update | https://www.mdpi.com/1999-5903/9/4/86/xml |
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| article pdf uploaded. | 17 November 2017 10:33 CET | Version of Record | https://www.mdpi.com/1999-5903/9/4/86/pdf |