| article html file updated | 6 February 2020 00:53 CET | Update | https://www.mdpi.com/2072-666X/4/1/34 |
| article html file updated | 8 May 2019 07:36 CEST | Update | - |
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| article html file updated | 17 June 2015 07:19 CEST | Original file | - |
| article pdf uploaded. | 8 March 2013 10:43 CET | Version of Record | https://www.mdpi.com/2072-666X/4/1/34/pdf |
