| article html file updated | 9 February 2020 00:25 CET | Update | https://www.mdpi.com/2218-1997/3/4/85 |
| article html file updated | 2 May 2019 07:50 CEST | Update | - |
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| article html file updated | 18 December 2017 13:09 CET | Original file | - |
| article xml uploaded. | 18 December 2017 13:08 CET | Original file | https://www.mdpi.com/2218-1997/3/4/85/xml |
| article pdf uploaded. | 18 December 2017 13:08 CET | Version of Record | https://www.mdpi.com/2218-1997/3/4/85/pdf |
