| article html file updated | 8 February 2020 07:40 CET | Update | https://www.mdpi.com/2071-1050/9/6/975 |
| article html file updated | 25 September 2019 05:14 CEST | Update | - |
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| article html file updated | 28 June 2017 14:42 CEST | Update | - |
| article html file updated | 7 June 2017 11:48 CEST | Original file | - |
| article xml uploaded. | 7 June 2017 11:46 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/975/xml |
| article pdf uploaded. | 7 June 2017 11:46 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/975/pdf |
