| article html file updated | 9 February 2020 06:38 CET | Update | https://www.mdpi.com/2073-4409/7/2/13 |
| article html file updated | 1 May 2019 18:26 CEST | Update | - |
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| article html file updated | 14 March 2018 16:38 CET | Update | - |
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| article xml uploaded. | 14 February 2018 08:05 CET | Original file | https://www.mdpi.com/2073-4409/7/2/13/xml |
| article pdf uploaded. | 14 February 2018 08:05 CET | Version of Record | https://www.mdpi.com/2073-4409/7/2/13/pdf |
