| article html file updated | 5 February 2020 12:15 CET | Update | https://www.mdpi.com/2071-1050/1/2/254 |
| article html file updated | 18 September 2019 17:55 CEST | Update | - |
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| article html file updated | 19 March 2019 18:35 CET | Update | - |
| article html file updated | 20 July 2017 09:59 CEST | Update | - |
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| article html file updated | 20 July 2017 09:57 CEST | Original file | - |
| article xml uploaded. | 20 July 2017 09:55 CEST | Original file | https://www.mdpi.com/2071-1050/1/2/254/xml |
