| article html file updated | 7 February 2020 17:39 CET | Update | https://www.mdpi.com/2079-9292/5/4/77 |
| article html file updated | 22 September 2019 04:57 CEST | Update | - |
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| article html file updated | 29 December 2016 11:06 CET | Update | - |
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| article xml uploaded. | 8 November 2016 11:14 CET | Original file | https://www.mdpi.com/2079-9292/5/4/77/xml |
| article pdf uploaded. | 8 November 2016 11:14 CET | Version of Record | https://www.mdpi.com/2079-9292/5/4/77/pdf |
