| article html file updated | 31 August 2025 10:13 CEST | Update | https://www.mdpi.com/2223-7747/9/2/164 | 
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| article pdf uploaded. | 5 March 2020 10:14 CET | Updated version of record | https://www.mdpi.com/2223-7747/9/2/164/pdf | 
| article html file updated | 15 February 2020 06:26 CET | Update | - | 
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| article xml uploaded. | 29 January 2020 15:16 CET | Update | https://www.mdpi.com/2223-7747/9/2/164/xml | 
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