| article html file updated | 7 February 2020 17:49 CET | Update | https://www.mdpi.com/2078-2489/7/4/67 |
| article html file updated | 22 September 2019 05:16 CEST | Update | - |
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| article html file updated | 29 December 2016 11:08 CET | Update | - |
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| article xml uploaded. | 10 November 2016 12:35 CET | Original file | https://www.mdpi.com/2078-2489/7/4/67/xml |
| article pdf uploaded. | 10 November 2016 12:35 CET | Version of Record | https://www.mdpi.com/2078-2489/7/4/67/pdf |
