| article html file updated | 30 August 2025 14:46 CEST | Update | https://www.mdpi.com/1996-1073/12/9/1721 |
| article html file updated | 19 July 2022 18:17 CEST | Update | N/A |
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| article html file updated | 7 May 2019 12:04 CEST | Original file | N/A |
| article pdf uploaded. | 7 May 2019 12:02 CEST | Version of Record | https://www.mdpi.com/1996-1073/12/9/1721/pdf |
| article xml uploaded. | 7 May 2019 12:02 CEST | Update | https://www.mdpi.com/1996-1073/12/9/1721/xml |
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