| article html file updated | 5 February 2020 15:42 CET | Update | https://www.mdpi.com/2078-2489/1/2/60 |
| article html file updated | 9 May 2019 03:56 CEST | Update | - |
| article html file updated | 20 March 2019 03:38 CET | Update | - |
| article html file updated | 20 July 2017 10:59 CEST | Update | - |
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| article html file updated | 20 July 2017 10:58 CEST | Original file | - |
| article xml uploaded. | 20 July 2017 10:57 CEST | Original file | https://www.mdpi.com/2078-2489/1/2/60/xml |
