| article html file updated | 6 February 2020 02:40 CET | Update | https://www.mdpi.com/2075-4450/4/2/273 |
| article html file updated | 19 September 2019 21:51 CEST | Update | - |
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| article html file updated | 17 June 2015 10:20 CEST | Update | - |
| article html file updated | 27 January 2015 07:07 CET | Original file | - |
| article xml file uploaded | 27 January 2015 07:07 CET | Original file | https://www.mdpi.com/2075-4450/4/2/273/xml |
| article pdf uploaded. | 18 June 2013 10:43 CEST | Version of Record | https://www.mdpi.com/2075-4450/4/2/273/pdf |
