| article html file updated | 7 February 2020 06:41 CET | Update | https://www.mdpi.com/2075-163X/6/2/31 |
| article html file updated | 5 May 2019 19:52 CEST | Update | - |
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| article html file updated | 4 July 2016 06:19 CEST | Update | - |
| article html file updated | 31 March 2016 14:26 CEST | Original file | - |
| article xml uploaded. | 31 March 2016 14:25 CEST | Original file | https://www.mdpi.com/2075-163X/6/2/31/xml |
| article pdf uploaded. | 31 March 2016 14:25 CEST | Version of Record | https://www.mdpi.com/2075-163X/6/2/31/pdf |
