| article html file updated | 31 August 2025 23:10 CEST | Update | https://www.mdpi.com/2076-3921/9/6/509 |
| article html file updated | 21 July 2022 20:25 CEST | Update | N/A |
| article html file updated | 10 June 2020 11:17 CEST | Original file | N/A |
| article pdf uploaded. | 10 June 2020 11:15 CEST | Version of Record | https://www.mdpi.com/2076-3921/9/6/509/pdf |
| article xml uploaded. | 10 June 2020 11:15 CEST | Update | https://www.mdpi.com/2076-3921/9/6/509/xml |
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