| article html file updated | 31 August 2025 08:20 CEST | Update | https://www.mdpi.com/2227-9717/8/1/75 | 
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| article pdf uploaded. | 21 January 2020 10:38 CET | Updated version of record | https://www.mdpi.com/2227-9717/8/1/75/pdf | 
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| article pdf uploaded. | 21 January 2020 10:26 CET | Updated version of record | https://www.mdpi.com/2227-9717/8/1/75/pdf-vor | 
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| article pdf uploaded. | 6 January 2020 14:21 CET | Version of Record | https://www.mdpi.com/2227-9717/8/1/75/pdf-vor | 
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