| article html file updated | 8 February 2020 23:14 CET | Update | https://www.mdpi.com/2227-9091/5/4/63 |
| article html file updated | 2 May 2019 10:26 CEST | Update | - |
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| article xml uploaded. | 5 December 2017 15:23 CET | Original file | https://www.mdpi.com/2227-9091/5/4/63/xml |
| article pdf uploaded. | 5 December 2017 15:23 CET | Version of Record | https://www.mdpi.com/2227-9091/5/4/63/pdf |
