| article html file updated | 31 August 2025 08:55 CEST | Update | https://www.mdpi.com/1422-0067/21/2/509 | 
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| article pdf uploaded. | 22 January 2020 03:54 CET | Updated version of record | https://www.mdpi.com/1422-0067/21/2/509/pdf | 
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| article pdf uploaded. | 13 January 2020 16:22 CET | Version of Record | https://www.mdpi.com/1422-0067/21/2/509/pdf-vor | 
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