| article html file updated | 7 February 2020 20:28 CET | Update | https://www.mdpi.com/2075-4701/7/1/7 |
| article html file updated | 22 September 2019 16:09 CEST | Update | - |
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| article xml uploaded. | 29 December 2016 11:12 CET | Original file | https://www.mdpi.com/2075-4701/7/1/7/xml |
| article pdf uploaded. | 29 December 2016 11:12 CET | Version of Record | https://www.mdpi.com/2075-4701/7/1/7/pdf |
