| article html file updated | 31 August 2025 11:09 CEST | Update | https://www.mdpi.com/2227-7390/8/2/221 |
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| article html file updated | 6 March 2020 07:38 CET | Update | - |
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| article pdf uploaded. | 29 February 2020 07:38 CET | Updated version of record | https://www.mdpi.com/2227-7390/8/2/221/pdf |
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| article pdf uploaded. | 9 February 2020 08:16 CET | Version of Record | https://www.mdpi.com/2227-7390/8/2/221/pdf-vor |
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