| article html file updated | 9 February 2020 02:36 CET | Update | https://www.mdpi.com/2076-3417/8/1/90 |
| article html file updated | 29 September 2019 19:32 CEST | Update | - |
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| article xml uploaded. | 10 January 2018 14:12 CET | Update | https://www.mdpi.com/2076-3417/8/1/90/xml |
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| article pdf uploaded. | 10 January 2018 14:12 CET | Version of Record | https://www.mdpi.com/2076-3417/8/1/90/pdf |