| article html file updated | 16 August 2026 22:32 CEST | Update | https://www.mdpi.com/2504-3900/39/1/4 |
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| article pdf uploaded. | 31 December 2019 03:33 CET | Updated version of record | https://www.mdpi.com/2504-3900/39/1/4/pdf |
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| article xml file uploaded | 30 December 2019 09:09 CET | Original file | https://www.mdpi.com/2504-3900/39/1/4/xml |
