| article html file updated | 7 February 2020 07:54 CET | Update | https://new.mdpi.com/2075-5309/6/2/18 |
| article html file updated | 5 May 2019 17:21 CEST | Update | - |
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| article html file updated | 1 July 2016 10:16 CEST | Update | - |
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| article xml uploaded. | 28 April 2016 08:59 CEST | Original file | https://new.mdpi.com/2075-5309/6/2/18/xml |
| article pdf uploaded. | 28 April 2016 08:59 CEST | Version of Record | https://new.mdpi.com/2075-5309/6/2/18/pdf |
