| article html file updated | 7 February 2020 20:02 CET | Update | https://www.mdpi.com/1999-4923/8/4/36 |
| article html file updated | 22 September 2019 13:47 CEST | Update | - |
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| article html file updated | 29 December 2016 11:52 CET | Update | - |
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| article xml uploaded. | 21 December 2016 10:15 CET | Original file | https://www.mdpi.com/1999-4923/8/4/36/xml |
| article pdf uploaded. | 21 December 2016 10:15 CET | Version of Record | https://www.mdpi.com/1999-4923/8/4/36/pdf |
