| article html file updated | 9 February 2020 00:30 CET | Update | https://www.mdpi.com/2227-7390/5/4/84 |
| article html file updated | 29 September 2019 07:41 CEST | Update | - |
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| article html file updated | 19 December 2017 09:14 CET | Original file | - |
| article xml uploaded. | 19 December 2017 09:13 CET | Update | https://www.mdpi.com/2227-7390/5/4/84/xml |
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| article pdf uploaded. | 19 December 2017 09:13 CET | Version of Record | https://www.mdpi.com/2227-7390/5/4/84/pdf |