| article html file updated | 9 February 2020 03:30 CET | Update | https://www.mdpi.com/2227-9067/5/1/13 |
| article html file updated | 30 September 2019 00:47 CEST | Update | - |
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| article xml uploaded. | 18 January 2018 15:29 CET | Original file | https://www.mdpi.com/2227-9067/5/1/13/xml |
| article pdf uploaded. | 18 January 2018 15:29 CET | Version of Record | https://www.mdpi.com/2227-9067/5/1/13/pdf |
