| article html file updated | 11 February 2020 06:11 CET | Update | https://www.mdpi.com/2073-4468/8/1/4 |
| article html file updated | 27 April 2019 12:33 CEST | Update | - |
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| article pdf uploaded. | 1 January 2019 11:26 CET | Updated version of record | https://www.mdpi.com/2073-4468/8/1/4/pdf |
| article xml uploaded. | 1 January 2019 11:26 CET | Update | https://www.mdpi.com/2073-4468/8/1/4/xml |
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| article html file updated | 1 January 2019 11:08 CET | Original file | - |
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