| article html file updated | 8 February 2020 22:41 CET | Update | https://www.mdpi.com/2218-1997/3/4/82 |
| article html file updated | 2 May 2019 11:39 CEST | Update | - |
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| article html file updated | 30 November 2017 17:21 CET | Original file | - |
| article xml uploaded. | 30 November 2017 15:47 CET | Original file | https://www.mdpi.com/2218-1997/3/4/82/xml |
| article pdf uploaded. | 30 November 2017 15:47 CET | Version of Record | https://www.mdpi.com/2218-1997/3/4/82/pdf |
