| article html file updated | 6 February 2020 00:06 CET | Update | https://www.mdpi.com/2075-5309/3/1/100 |
| article html file updated | 8 May 2019 09:35 CEST | Update | - |
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| article html file updated | 24 January 2013 12:30 CET | Original file | - |
| article pdf uploaded. | 21 January 2013 08:09 CET | Version of Record | https://www.mdpi.com/2075-5309/3/1/100/pdf |
