| article html file updated | 9 February 2020 02:01 CET | Update | https://www.mdpi.com/2075-4701/8/1/31 |
| article html file updated | 29 September 2019 16:20 CEST | Update | - |
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| article xml uploaded. | 4 January 2018 16:06 CET | Original file | https://www.mdpi.com/2075-4701/8/1/31/xml |
| article pdf uploaded. | 4 January 2018 16:06 CET | Version of Record | https://www.mdpi.com/2075-4701/8/1/31/pdf |
