| article html file updated | 7 February 2020 20:15 CET | Update | https://www.mdpi.com/1999-4907/8/1/10 |
| article html file updated | 22 September 2019 14:57 CEST | Update | - |
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| article html file updated | 24 December 2016 09:07 CET | Original file | - |
| article xml uploaded. | 24 December 2016 09:05 CET | Original file | https://www.mdpi.com/1999-4907/8/1/10/xml |
| article pdf uploaded. | 24 December 2016 09:05 CET | Version of Record | https://www.mdpi.com/1999-4907/8/1/10/pdf |
