| article html file updated | 7 February 2020 04:28 CET | Update | https://www.mdpi.com/2076-3417/6/2/48 |
| article html file updated | 6 May 2019 00:33 CEST | Update | - |
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| article xml uploaded. | 8 February 2016 09:52 CET | Original file | https://www.mdpi.com/2076-3417/6/2/48/xml |
| article pdf uploaded. | 8 February 2016 09:52 CET | Version of Record | https://www.mdpi.com/2076-3417/6/2/48/pdf |
