| article html file updated | 9 February 2020 03:36 CET | Update | https://www.mdpi.com/2077-1444/9/1/30 |
| article html file updated | 30 September 2019 01:16 CEST | Update | - |
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| article html file updated | 1 February 2018 07:47 CET | Update | - |
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| article xml uploaded. | 19 January 2018 07:38 CET | Original file | https://www.mdpi.com/2077-1444/9/1/30/xml |
| article pdf uploaded. | 19 January 2018 07:38 CET | Version of Record | https://www.mdpi.com/2077-1444/9/1/30/pdf |
