| article html file updated | 6 February 2020 15:00 CET | Update | https://www.mdpi.com/2072-666X/6/1/160 |
| article html file updated | 7 May 2019 02:51 CEST | Update | - |
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| article html file updated | 20 January 2015 08:36 CET | Original file | - |
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| article pdf uploaded. | 7 January 2015 17:54 CET | Version of Record | https://www.mdpi.com/2072-666X/6/1/160/pdf |